Movement Disorders

The brain is inarguably the most complex and mysterious organ in the human body.

As the epicenter of intelligence, mastermind of movement, and song for our senses, the brain is more than a 3-lb organ encased in shell and fluid. Rather, it is the crown jewel that defines the self and, broadly, humanity.

©Thinkstock

For decades now, researchers have been exploring the potential for connecting our own astounding biological “computer” with actual physical mainframes. These so-called “brain-computer interfaces” (BCIs) are showing promise in treating an array of conditions, including paralysis, deafness, stroke, and even psychiatric disorders.

Among the big players in this area of research is billionaire entrepreneur Elon Musk, who in 2016 founded Neuralink. The company’s short-term mission is to develop a brain-to-machine interface to help people with neurologic conditions (for example, Parkinson’s disease). The long-term mission is to steer humanity into the era of “superhuman cognition.”

But first, some neuroscience 101.

Neurons are specialized cells that transmit and receive information. The basic structure of a neuron includes the dendrite, soma, and axon. The dendrite is the signal receiver. The soma is the cell body that is connected to the dendrites and serves as a structure to pass signals. The axon, also known as the nerve fiber, transmits the signal away from the soma.

Neurons communicate with each other at the synapse (for example, axon-dendrite connection). Neurons send information to each other through action potentials. An action potential may be defined as an electric impulse that transmits down the axon, causing the release of neurotransmitters, which may consequently either inhibit or excite the next neuron (leading to the initiation of another action potential).

So how will the company and other BCI companies tap into this evolutionarily ancient system to develop an implant that will obtain and decode information output from the brain?

The Neuralink implant is composed of three parts: The Link, neural threads, and the charger.

A robotic system, controlled by a neurosurgeon, will place an implant into the brain. The Link is the central component. It processes and transmits neural signals. The micron-scale neural threads are connected to the Link and other areas of the brain. The threads also contain electrodes, which are responsible for detecting neural signals. The charger ensures the battery is charged via wireless connection.

The invasive nature of this implant allows for precise readouts of electric outputs from the brain – unlike noninvasive devices, which are less sensitive and specific. Additionally, owing to its small size, engineers and neurosurgeons can implant the device in very specific brain regions as well as customize electrode distribution.

The Neuralink implant would be paired with an application via Bluetooth connection. The goal is to enable someone with the implant to control their device or computer by simply thinking. The application offers several exercises to help guide and train individuals on how to use the implant for its intended purpose. This technology would allow people with neurologic difficulties (for example, paralysis) to communicate more easily through text or speech synthesis, as well as partake in creative activities such as photography.

Existing text and speech synthesis technology are already underway. For example, Synchron, a BCI platform company, is investigating the use of Stentrode for people with severe paralysis. This neuroprosthesis was designed to help people associate thought with movement through Bluetooth technology (for example, texting, emailing, shopping, online banking). Preliminary results from a study in which the device was used for patients with amyotrophic lateral sclerosis showed improvements in functional independence via direct thinking.

Software intended to enable high-performance handwriting utilizing BCI technology is being developed by Francis R. Willett, PhD, at Stanford (Calif.) University. The technology has also shown promise.

“We’ve learned that the brain retains its ability to prescribe fine movements a full decade after the body has lost its ability to execute those movements,” says Dr. Willett, who recently reported on results from a BCI study of handwriting conversion in an individual with full-body paralysis. Through a recurrent neural networking decoding approach, the BrainGate study participant was able to type 90 characters per minute – with an impressive 94.1% raw accuracy – using thoughts alone.

Although not a fully implantable brain device, this percutaneous implant has also been studied of its capacity to restore arm function among individuals who suffered from chronic stroke. Preliminary results from the Cortimo trials, led by Mijail D. Serruya, MD, an assistant professor at Thomas Jefferson University, Philadelphia, have been positive. Researchers implanted microelectrode arrays to decode brain signals and power motor function in a participant who had experienced a stroke 2 years earlier. The participant was able to use a powered arm brace on their paralyzed arm.

Neuralink recently released a video demonstrating the use of the interface in a monkey named Pager as it played a game with a joystick. Company researchers inserted a 1024-Electrode neural recording and data transmission device called the N1 Link into the left and right motor cortices. Using the implant, neural activity was sent to a decoder algorithm. Throughout the process, the decoder algorithm was refined and calibrated. After a few minutes, Pager was able to control the cursor on the screen using his mind instead of the joystick.

Mr. Musk hopes to develop Neuralink further to change not only the way we treat neurological disorders but also the way we interact with ourselves and our environment. It’s a lofty goal to be sure, but one that doesn’t seem outside the realm of possibility in the near future.
 

Known unknowns: The ethical dilemmas

One major conundrum facing the future of BCI technology is that researchers don’t fully understand the science regarding how brain signaling, artificial intelligence (AI) software, and prostheses interact. Although offloading computations improves the predictive nature of AI algorithms, there are concerns of identity and personal agency.

How do we know that an action is truly the result of one’s own thinking or, rather, the outcome of AI software? In this context, the autocorrect function while typing can be incredibly useful when we’re in a pinch for time, when we’re using one hand to type, or because of ease. However, it’s also easy to create and send out unintended or inappropriate messages.

These algorithms are designed to learn from our behavior and anticipate our next move. However, a question arises as to whether we are the authors of our own thoughts or whether we are simply the device that delivers messages under the control of external forces.

“People may question whether new personality changes they experience are truly representative of themselves or whether they are now a product of the implant (e.g., ‘Is that really me?’; ‘Have I grown as a person, or is it the technology?’). This then raises questions about agency and who we are as people,” says Kerry Bowman, PhD, a clinical bioethicist and assistant professor at the Temerty Faculty of Medicine of the University of Toronto.

It’s important to have safeguards in place to ensure the privacy of our thoughts. In an age where data is currency, it’s crucial to establish boundaries to preserve our autonomy and prevent exploitation (for example, by private companies or hackers). Although Neuralink and BCIs generally are certainly pushing the boundaries of neural engineering in profound ways, it’s important to note the biological and ethical implications of this technology.

As Dr. Bowman points out, “throughout the entire human story, under the worst of human circumstances, such as captivity and torture, the one safe ground and place for all people has been the privacy of one’s own mind. No one could ever interfere, take away, or be aware of those thoughts. However, this technology challenges one’s own privacy – that this technology (and, by extension, a company) could be aware of those thoughts.”

A version of this article first appeared on Medscape.com.

The brain is inarguably the most complex and mysterious organ in the human body.

As the epicenter of intelligence, mastermind of movement, and song for our senses, the brain is more than a 3-lb organ encased in shell and fluid. Rather, it is the crown jewel that defines the self and, broadly, humanity.

©Thinkstock

For decades now, researchers have been exploring the potential for connecting our own astounding biological “computer” with actual physical mainframes. These so-called “brain-computer interfaces” (BCIs) are showing promise in treating an array of conditions, including paralysis, deafness, stroke, and even psychiatric disorders.

Among the big players in this area of research is billionaire entrepreneur Elon Musk, who in 2016 founded Neuralink. The company’s short-term mission is to develop a brain-to-machine interface to help people with neurologic conditions (for example, Parkinson’s disease). The long-term mission is to steer humanity into the era of “superhuman cognition.”

But first, some neuroscience 101.

Neurons are specialized cells that transmit and receive information. The basic structure of a neuron includes the dendrite, soma, and axon. The dendrite is the signal receiver. The soma is the cell body that is connected to the dendrites and serves as a structure to pass signals. The axon, also known as the nerve fiber, transmits the signal away from the soma.

Neurons communicate with each other at the synapse (for example, axon-dendrite connection). Neurons send information to each other through action potentials. An action potential may be defined as an electric impulse that transmits down the axon, causing the release of neurotransmitters, which may consequently either inhibit or excite the next neuron (leading to the initiation of another action potential).

So how will the company and other BCI companies tap into this evolutionarily ancient system to develop an implant that will obtain and decode information output from the brain?

The Neuralink implant is composed of three parts: The Link, neural threads, and the charger.

A robotic system, controlled by a neurosurgeon, will place an implant into the brain. The Link is the central component. It processes and transmits neural signals. The micron-scale neural threads are connected to the Link and other areas of the brain. The threads also contain electrodes, which are responsible for detecting neural signals. The charger ensures the battery is charged via wireless connection.

The invasive nature of this implant allows for precise readouts of electric outputs from the brain – unlike noninvasive devices, which are less sensitive and specific. Additionally, owing to its small size, engineers and neurosurgeons can implant the device in very specific brain regions as well as customize electrode distribution.

The Neuralink implant would be paired with an application via Bluetooth connection. The goal is to enable someone with the implant to control their device or computer by simply thinking. The application offers several exercises to help guide and train individuals on how to use the implant for its intended purpose. This technology would allow people with neurologic difficulties (for example, paralysis) to communicate more easily through text or speech synthesis, as well as partake in creative activities such as photography.

Existing text and speech synthesis technology are already underway. For example, Synchron, a BCI platform company, is investigating the use of Stentrode for people with severe paralysis. This neuroprosthesis was designed to help people associate thought with movement through Bluetooth technology (for example, texting, emailing, shopping, online banking). Preliminary results from a study in which the device was used for patients with amyotrophic lateral sclerosis showed improvements in functional independence via direct thinking.

Software intended to enable high-performance handwriting utilizing BCI technology is being developed by Francis R. Willett, PhD, at Stanford (Calif.) University. The technology has also shown promise.

“We’ve learned that the brain retains its ability to prescribe fine movements a full decade after the body has lost its ability to execute those movements,” says Dr. Willett, who recently reported on results from a BCI study of handwriting conversion in an individual with full-body paralysis. Through a recurrent neural networking decoding approach, the BrainGate study participant was able to type 90 characters per minute – with an impressive 94.1% raw accuracy – using thoughts alone.

Although not a fully implantable brain device, this percutaneous implant has also been studied of its capacity to restore arm function among individuals who suffered from chronic stroke. Preliminary results from the Cortimo trials, led by Mijail D. Serruya, MD, an assistant professor at Thomas Jefferson University, Philadelphia, have been positive. Researchers implanted microelectrode arrays to decode brain signals and power motor function in a participant who had experienced a stroke 2 years earlier. The participant was able to use a powered arm brace on their paralyzed arm.

Neuralink recently released a video demonstrating the use of the interface in a monkey named Pager as it played a game with a joystick. Company researchers inserted a 1024-Electrode neural recording and data transmission device called the N1 Link into the left and right motor cortices. Using the implant, neural activity was sent to a decoder algorithm. Throughout the process, the decoder algorithm was refined and calibrated. After a few minutes, Pager was able to control the cursor on the screen using his mind instead of the joystick.

Mr. Musk hopes to develop Neuralink further to change not only the way we treat neurological disorders but also the way we interact with ourselves and our environment. It’s a lofty goal to be sure, but one that doesn’t seem outside the realm of possibility in the near future.
 

Known unknowns: The ethical dilemmas

One major conundrum facing the future of BCI technology is that researchers don’t fully understand the science regarding how brain signaling, artificial intelligence (AI) software, and prostheses interact. Although offloading computations improves the predictive nature of AI algorithms, there are concerns of identity and personal agency.

How do we know that an action is truly the result of one’s own thinking or, rather, the outcome of AI software? In this context, the autocorrect function while typing can be incredibly useful when we’re in a pinch for time, when we’re using one hand to type, or because of ease. However, it’s also easy to create and send out unintended or inappropriate messages.

These algorithms are designed to learn from our behavior and anticipate our next move. However, a question arises as to whether we are the authors of our own thoughts or whether we are simply the device that delivers messages under the control of external forces.

“People may question whether new personality changes they experience are truly representative of themselves or whether they are now a product of the implant (e.g., ‘Is that really me?’; ‘Have I grown as a person, or is it the technology?’). This then raises questions about agency and who we are as people,” says Kerry Bowman, PhD, a clinical bioethicist and assistant professor at the Temerty Faculty of Medicine of the University of Toronto.

It’s important to have safeguards in place to ensure the privacy of our thoughts. In an age where data is currency, it’s crucial to establish boundaries to preserve our autonomy and prevent exploitation (for example, by private companies or hackers). Although Neuralink and BCIs generally are certainly pushing the boundaries of neural engineering in profound ways, it’s important to note the biological and ethical implications of this technology.

As Dr. Bowman points out, “throughout the entire human story, under the worst of human circumstances, such as captivity and torture, the one safe ground and place for all people has been the privacy of one’s own mind. No one could ever interfere, take away, or be aware of those thoughts. However, this technology challenges one’s own privacy – that this technology (and, by extension, a company) could be aware of those thoughts.”

A version of this article first appeared on Medscape.com.

The brain is inarguably the most complex and mysterious organ in the human body.

As the epicenter of intelligence, mastermind of movement, and song for our senses, the brain is more than a 3-lb organ encased in shell and fluid. Rather, it is the crown jewel that defines the self and, broadly, humanity.

©Thinkstock

For decades now, researchers have been exploring the potential for connecting our own astounding biological “computer” with actual physical mainframes. These so-called “brain-computer interfaces” (BCIs) are showing promise in treating an array of conditions, including paralysis, deafness, stroke, and even psychiatric disorders.

Among the big players in this area of research is billionaire entrepreneur Elon Musk, who in 2016 founded Neuralink. The company’s short-term mission is to develop a brain-to-machine interface to help people with neurologic conditions (for example, Parkinson’s disease). The long-term mission is to steer humanity into the era of “superhuman cognition.”

But first, some neuroscience 101.

Neurons are specialized cells that transmit and receive information. The basic structure of a neuron includes the dendrite, soma, and axon. The dendrite is the signal receiver. The soma is the cell body that is connected to the dendrites and serves as a structure to pass signals. The axon, also known as the nerve fiber, transmits the signal away from the soma.

Neurons communicate with each other at the synapse (for example, axon-dendrite connection). Neurons send information to each other through action potentials. An action potential may be defined as an electric impulse that transmits down the axon, causing the release of neurotransmitters, which may consequently either inhibit or excite the next neuron (leading to the initiation of another action potential).

So how will the company and other BCI companies tap into this evolutionarily ancient system to develop an implant that will obtain and decode information output from the brain?

The Neuralink implant is composed of three parts: The Link, neural threads, and the charger.

A robotic system, controlled by a neurosurgeon, will place an implant into the brain. The Link is the central component. It processes and transmits neural signals. The micron-scale neural threads are connected to the Link and other areas of the brain. The threads also contain electrodes, which are responsible for detecting neural signals. The charger ensures the battery is charged via wireless connection.

The invasive nature of this implant allows for precise readouts of electric outputs from the brain – unlike noninvasive devices, which are less sensitive and specific. Additionally, owing to its small size, engineers and neurosurgeons can implant the device in very specific brain regions as well as customize electrode distribution.

The Neuralink implant would be paired with an application via Bluetooth connection. The goal is to enable someone with the implant to control their device or computer by simply thinking. The application offers several exercises to help guide and train individuals on how to use the implant for its intended purpose. This technology would allow people with neurologic difficulties (for example, paralysis) to communicate more easily through text or speech synthesis, as well as partake in creative activities such as photography.

Existing text and speech synthesis technology are already underway. For example, Synchron, a BCI platform company, is investigating the use of Stentrode for people with severe paralysis. This neuroprosthesis was designed to help people associate thought with movement through Bluetooth technology (for example, texting, emailing, shopping, online banking). Preliminary results from a study in which the device was used for patients with amyotrophic lateral sclerosis showed improvements in functional independence via direct thinking.

Software intended to enable high-performance handwriting utilizing BCI technology is being developed by Francis R. Willett, PhD, at Stanford (Calif.) University. The technology has also shown promise.

“We’ve learned that the brain retains its ability to prescribe fine movements a full decade after the body has lost its ability to execute those movements,” says Dr. Willett, who recently reported on results from a BCI study of handwriting conversion in an individual with full-body paralysis. Through a recurrent neural networking decoding approach, the BrainGate study participant was able to type 90 characters per minute – with an impressive 94.1% raw accuracy – using thoughts alone.

Although not a fully implantable brain device, this percutaneous implant has also been studied of its capacity to restore arm function among individuals who suffered from chronic stroke. Preliminary results from the Cortimo trials, led by Mijail D. Serruya, MD, an assistant professor at Thomas Jefferson University, Philadelphia, have been positive. Researchers implanted microelectrode arrays to decode brain signals and power motor function in a participant who had experienced a stroke 2 years earlier. The participant was able to use a powered arm brace on their paralyzed arm.

Neuralink recently released a video demonstrating the use of the interface in a monkey named Pager as it played a game with a joystick. Company researchers inserted a 1024-Electrode neural recording and data transmission device called the N1 Link into the left and right motor cortices. Using the implant, neural activity was sent to a decoder algorithm. Throughout the process, the decoder algorithm was refined and calibrated. After a few minutes, Pager was able to control the cursor on the screen using his mind instead of the joystick.

Mr. Musk hopes to develop Neuralink further to change not only the way we treat neurological disorders but also the way we interact with ourselves and our environment. It’s a lofty goal to be sure, but one that doesn’t seem outside the realm of possibility in the near future.
 

Known unknowns: The ethical dilemmas

One major conundrum facing the future of BCI technology is that researchers don’t fully understand the science regarding how brain signaling, artificial intelligence (AI) software, and prostheses interact. Although offloading computations improves the predictive nature of AI algorithms, there are concerns of identity and personal agency.

How do we know that an action is truly the result of one’s own thinking or, rather, the outcome of AI software? In this context, the autocorrect function while typing can be incredibly useful when we’re in a pinch for time, when we’re using one hand to type, or because of ease. However, it’s also easy to create and send out unintended or inappropriate messages.

These algorithms are designed to learn from our behavior and anticipate our next move. However, a question arises as to whether we are the authors of our own thoughts or whether we are simply the device that delivers messages under the control of external forces.

“People may question whether new personality changes they experience are truly representative of themselves or whether they are now a product of the implant (e.g., ‘Is that really me?’; ‘Have I grown as a person, or is it the technology?’). This then raises questions about agency and who we are as people,” says Kerry Bowman, PhD, a clinical bioethicist and assistant professor at the Temerty Faculty of Medicine of the University of Toronto.

It’s important to have safeguards in place to ensure the privacy of our thoughts. In an age where data is currency, it’s crucial to establish boundaries to preserve our autonomy and prevent exploitation (for example, by private companies or hackers). Although Neuralink and BCIs generally are certainly pushing the boundaries of neural engineering in profound ways, it’s important to note the biological and ethical implications of this technology.

As Dr. Bowman points out, “throughout the entire human story, under the worst of human circumstances, such as captivity and torture, the one safe ground and place for all people has been the privacy of one’s own mind. No one could ever interfere, take away, or be aware of those thoughts. However, this technology challenges one’s own privacy – that this technology (and, by extension, a company) could be aware of those thoughts.”

A version of this article first appeared on Medscape.com.

The hallmark of Parkinson’s disease is the accompanying motor symptoms, but the condition can bring other challenges. Among those are nonmotor symptoms, including depression, dementia, and even psychosis.

The culprit is Lewy bodies, which are also responsible for Lewy body dementia. “What we call Lewy body dementia and Parkinson’s disease are caused by the same pathological process – the formation of Lewy bodies in the brain,” Leslie Citrome, MD, MPH, said in an interview. Dr. Citrome discussed some of the psychiatric comorbidities associated with Parkinson’s disease at a virtual meeting presented by Current Psychiatry and the American Academy of Clinical Psychiatrists.

In fact, the association goes both ways. “Many people with Parkinson’s disease develop a dementia. Many people with Lewy body dementia develop motor symptoms that look just like Parkinson’s disease,” said Dr. Citrome, professor of psychiatry and behavioral sciences at New York Medical College, Valhalla, and president of the American Society for Clinical Psychopharmacology.

The motor symptoms of Parkinson’s disease are generally attributable to loss of striatal dopaminergic neurons, while nonmotor symptoms can be traced to loss of neurons in nondopaminergic regions. Nonmotor symptoms – often including sleep disorders, depression, cognitive changes, and psychosis – may occur before motor symptoms. Other problems may include autonomic dysfunction, such as constipation, sexual dysfunction, sweating, or urinary retention.

Patients might not be aware that nonmotor symptoms can occur with Parkinson’s disease and may not even consider mentioning mood changes or hallucinations to their neurologist. Family members may also be unaware.

Sleep problems are common in Parkinson’s disease, including rapid eye-movement sleep behavior disorders, vivid dreams, restless legs syndrome, insomnia, and daytime somnolence. Dopamine agonists may also cause unintended sleep.

Depression is extremely common, affecting up to 90% of Parkinson’s disease patients, and this may be related to dopaminergic losses. Antidepressant medications can worsen Parkinson’s disease symptoms: Tricyclic antidepressants increase risk of adverse events from anticholinergic drugs. Selective serotonin reuptake inhibitors (SSRIs) can exacerbate tremor and may increase risk of serotonin syndrome when combined with MAO‐B inhibitors.

Dr. Citrome was not aware of any antidepressant drugs that have been tested specifically in Parkinson’s disease patients, though “I’d be surprised if there wasn’t,” he said during the Q&A session. “There’s no one perfect antidepressant for people with depression associated with Parkinson’s disease. I would make sure to select one that they would tolerate and be willing to take and that doesn’t interfere with their treatment of their movement disorder, and (I would make sure) that there’s no drug-drug interaction,” he said.

Cognitive impairment or dementia is also very common, affecting about 75% of Parkinson’s patients. This can include reduced working memory, learning, and planning, and generally does not manifest until at least 1 year after motor symptoms have begun. Rivastigmine is Food and Drug Administration–approved for treatment of cognitive impairment in Parkinson’s disease.

As many as 60% of Parkinson’s disease patients suffer from psychosis at some point, often visual hallucinations or delusions, which can include beliefs of spousal infidelity.

Many clinicians prescribe quetiapine off label, but there are not compelling data to support that it reduces intensity and frequency of hallucinations and delusions, according to Dr. Citrome. However, it is relatively easy to prescribe, requiring no preauthorizations, it is inexpensive, and it may improve sleep.

The FDA approved pimavanserin in 2016 for hallucinations and delusions in Parkinson’s disease, and it doesn’t worsen motor symptoms, Dr. Citrome said. That’s because pimavanserin is a highly selective antagonist of the 5-HT2A receptor, with no effect on dopaminergic, histaminergic, adrenergic, or muscarinic receptors.

The drug improves positive symptoms beginning at days 29 and 43, compared with placebo. An analysis by Dr. Citrome’s group found a number needed to treat (NNT) of 7 to gain a benefit over placebo if the metric is a ≥ 30% reduction in baseline symptom score. The drug had an NNT of 9 to achieve a ≥ 50% reduction, and an NNT of 5 to achieve a score of much improved or very much improved on the Clinical Global Impression–Improvement (CGI-I) scale. In general, an NNT less than 10 suggests that a drug is clinically useful.

In contrast, the number needed to harm (NNH) represents the number of patients who would need to receive a therapy to add one adverse event, compared with placebo. A number greater than 10 indicates that the therapy may be tolerable.

Using various measures, the NNH was well over 10 for pimavanserin. With respect to somnolence, the NNH over placebo was 138, and for a weight gain of 7% or more, the NNH was 594.

Overall, the study found that 4 patients would need to be treated to achieve a benefit over placebo with respect to a ≥ 3–point improvement in the Scale of Positive Symptoms–Parkinson’s Disease (SAPS-PD), while 21 would need to receive the drug to lead to one additional discontinuation because of an adverse event, compared to placebo.

When researchers compared pimavanserin to off-label use of quetiapine, olanzapine, and clozapine, they found a Cohen’s d value of 0.50, which was better than quetiapine and olanzapine, but lower than for clozapine. However, there is no requirement of blood monitoring, and clozapine can potentially worsen motor symptoms.

Dr. Citrome’s presentation should be a reminder to neurologists that psychiatric disorders are an important patient concern, said Henry A. Nasrallah, MD, professor of psychiatry, neurology, and neuroscience at the University of Cincinnati, who moderated the session.

“I think this serves as a model to recognize that many neurological disorders actually present with numerous psychiatric disorders,” Dr. Nasrallah said during the meeting, presented by MedscapeLive. MedscapeLive and this news organization are owned by the same parent company.

Dr. Citrome has consulted for AbbVie, Acadia, Alkermes, Allergan, Angelini, Astellas, Avanir, Axsome, BioXcel, Boehringer-Ingelheim, Cadent Therapeutics, Eisai, Impel, Intra-Cellular, Janssen, Karuna, Lundbeck, Lyndra, MedAvante-ProPhase, Merck, Neurocrine, Noven, Otsuka, Ovid, Relmada, Sage, Sunovion, and Teva. He has been a speaker for most of those companies, and he holds stock in Bristol Myers Squibb, Eli Lilly, J&J, Merck, and Pfizer.

Dr. Nasrallah has consulted for Acadia, Alkermes, Allergan, Boehringer-Ingelheim, Indivior, Intra-Cellular, Janssen, Neurocrine, Otsuka, Sunovion, and Teva. He has served on a speakers bureau for most of those companies, in addition to that of Noven.

The hallmark of Parkinson’s disease is the accompanying motor symptoms, but the condition can bring other challenges. Among those are nonmotor symptoms, including depression, dementia, and even psychosis.

The culprit is Lewy bodies, which are also responsible for Lewy body dementia. “What we call Lewy body dementia and Parkinson’s disease are caused by the same pathological process – the formation of Lewy bodies in the brain,” Leslie Citrome, MD, MPH, said in an interview. Dr. Citrome discussed some of the psychiatric comorbidities associated with Parkinson’s disease at a virtual meeting presented by Current Psychiatry and the American Academy of Clinical Psychiatrists.

In fact, the association goes both ways. “Many people with Parkinson’s disease develop a dementia. Many people with Lewy body dementia develop motor symptoms that look just like Parkinson’s disease,” said Dr. Citrome, professor of psychiatry and behavioral sciences at New York Medical College, Valhalla, and president of the American Society for Clinical Psychopharmacology.

The motor symptoms of Parkinson’s disease are generally attributable to loss of striatal dopaminergic neurons, while nonmotor symptoms can be traced to loss of neurons in nondopaminergic regions. Nonmotor symptoms – often including sleep disorders, depression, cognitive changes, and psychosis – may occur before motor symptoms. Other problems may include autonomic dysfunction, such as constipation, sexual dysfunction, sweating, or urinary retention.

Patients might not be aware that nonmotor symptoms can occur with Parkinson’s disease and may not even consider mentioning mood changes or hallucinations to their neurologist. Family members may also be unaware.

Sleep problems are common in Parkinson’s disease, including rapid eye-movement sleep behavior disorders, vivid dreams, restless legs syndrome, insomnia, and daytime somnolence. Dopamine agonists may also cause unintended sleep.

Depression is extremely common, affecting up to 90% of Parkinson’s disease patients, and this may be related to dopaminergic losses. Antidepressant medications can worsen Parkinson’s disease symptoms: Tricyclic antidepressants increase risk of adverse events from anticholinergic drugs. Selective serotonin reuptake inhibitors (SSRIs) can exacerbate tremor and may increase risk of serotonin syndrome when combined with MAO‐B inhibitors.

Dr. Citrome was not aware of any antidepressant drugs that have been tested specifically in Parkinson’s disease patients, though “I’d be surprised if there wasn’t,” he said during the Q&A session. “There’s no one perfect antidepressant for people with depression associated with Parkinson’s disease. I would make sure to select one that they would tolerate and be willing to take and that doesn’t interfere with their treatment of their movement disorder, and (I would make sure) that there’s no drug-drug interaction,” he said.

Cognitive impairment or dementia is also very common, affecting about 75% of Parkinson’s patients. This can include reduced working memory, learning, and planning, and generally does not manifest until at least 1 year after motor symptoms have begun. Rivastigmine is Food and Drug Administration–approved for treatment of cognitive impairment in Parkinson’s disease.

As many as 60% of Parkinson’s disease patients suffer from psychosis at some point, often visual hallucinations or delusions, which can include beliefs of spousal infidelity.

Many clinicians prescribe quetiapine off label, but there are not compelling data to support that it reduces intensity and frequency of hallucinations and delusions, according to Dr. Citrome. However, it is relatively easy to prescribe, requiring no preauthorizations, it is inexpensive, and it may improve sleep.

The FDA approved pimavanserin in 2016 for hallucinations and delusions in Parkinson’s disease, and it doesn’t worsen motor symptoms, Dr. Citrome said. That’s because pimavanserin is a highly selective antagonist of the 5-HT2A receptor, with no effect on dopaminergic, histaminergic, adrenergic, or muscarinic receptors.

The drug improves positive symptoms beginning at days 29 and 43, compared with placebo. An analysis by Dr. Citrome’s group found a number needed to treat (NNT) of 7 to gain a benefit over placebo if the metric is a ≥ 30% reduction in baseline symptom score. The drug had an NNT of 9 to achieve a ≥ 50% reduction, and an NNT of 5 to achieve a score of much improved or very much improved on the Clinical Global Impression–Improvement (CGI-I) scale. In general, an NNT less than 10 suggests that a drug is clinically useful.

In contrast, the number needed to harm (NNH) represents the number of patients who would need to receive a therapy to add one adverse event, compared with placebo. A number greater than 10 indicates that the therapy may be tolerable.

Using various measures, the NNH was well over 10 for pimavanserin. With respect to somnolence, the NNH over placebo was 138, and for a weight gain of 7% or more, the NNH was 594.

Overall, the study found that 4 patients would need to be treated to achieve a benefit over placebo with respect to a ≥ 3–point improvement in the Scale of Positive Symptoms–Parkinson’s Disease (SAPS-PD), while 21 would need to receive the drug to lead to one additional discontinuation because of an adverse event, compared to placebo.

When researchers compared pimavanserin to off-label use of quetiapine, olanzapine, and clozapine, they found a Cohen’s d value of 0.50, which was better than quetiapine and olanzapine, but lower than for clozapine. However, there is no requirement of blood monitoring, and clozapine can potentially worsen motor symptoms.

Dr. Citrome’s presentation should be a reminder to neurologists that psychiatric disorders are an important patient concern, said Henry A. Nasrallah, MD, professor of psychiatry, neurology, and neuroscience at the University of Cincinnati, who moderated the session.

“I think this serves as a model to recognize that many neurological disorders actually present with numerous psychiatric disorders,” Dr. Nasrallah said during the meeting, presented by MedscapeLive. MedscapeLive and this news organization are owned by the same parent company.

Dr. Citrome has consulted for AbbVie, Acadia, Alkermes, Allergan, Angelini, Astellas, Avanir, Axsome, BioXcel, Boehringer-Ingelheim, Cadent Therapeutics, Eisai, Impel, Intra-Cellular, Janssen, Karuna, Lundbeck, Lyndra, MedAvante-ProPhase, Merck, Neurocrine, Noven, Otsuka, Ovid, Relmada, Sage, Sunovion, and Teva. He has been a speaker for most of those companies, and he holds stock in Bristol Myers Squibb, Eli Lilly, J&J, Merck, and Pfizer.

Dr. Nasrallah has consulted for Acadia, Alkermes, Allergan, Boehringer-Ingelheim, Indivior, Intra-Cellular, Janssen, Neurocrine, Otsuka, Sunovion, and Teva. He has served on a speakers bureau for most of those companies, in addition to that of Noven.

The hallmark of Parkinson’s disease is the accompanying motor symptoms, but the condition can bring other challenges. Among those are nonmotor symptoms, including depression, dementia, and even psychosis.

The culprit is Lewy bodies, which are also responsible for Lewy body dementia. “What we call Lewy body dementia and Parkinson’s disease are caused by the same pathological process – the formation of Lewy bodies in the brain,” Leslie Citrome, MD, MPH, said in an interview. Dr. Citrome discussed some of the psychiatric comorbidities associated with Parkinson’s disease at a virtual meeting presented by Current Psychiatry and the American Academy of Clinical Psychiatrists.

In fact, the association goes both ways. “Many people with Parkinson’s disease develop a dementia. Many people with Lewy body dementia develop motor symptoms that look just like Parkinson’s disease,” said Dr. Citrome, professor of psychiatry and behavioral sciences at New York Medical College, Valhalla, and president of the American Society for Clinical Psychopharmacology.

The motor symptoms of Parkinson’s disease are generally attributable to loss of striatal dopaminergic neurons, while nonmotor symptoms can be traced to loss of neurons in nondopaminergic regions. Nonmotor symptoms – often including sleep disorders, depression, cognitive changes, and psychosis – may occur before motor symptoms. Other problems may include autonomic dysfunction, such as constipation, sexual dysfunction, sweating, or urinary retention.

Patients might not be aware that nonmotor symptoms can occur with Parkinson’s disease and may not even consider mentioning mood changes or hallucinations to their neurologist. Family members may also be unaware.

Sleep problems are common in Parkinson’s disease, including rapid eye-movement sleep behavior disorders, vivid dreams, restless legs syndrome, insomnia, and daytime somnolence. Dopamine agonists may also cause unintended sleep.

Depression is extremely common, affecting up to 90% of Parkinson’s disease patients, and this may be related to dopaminergic losses. Antidepressant medications can worsen Parkinson’s disease symptoms: Tricyclic antidepressants increase risk of adverse events from anticholinergic drugs. Selective serotonin reuptake inhibitors (SSRIs) can exacerbate tremor and may increase risk of serotonin syndrome when combined with MAO‐B inhibitors.

Dr. Citrome was not aware of any antidepressant drugs that have been tested specifically in Parkinson’s disease patients, though “I’d be surprised if there wasn’t,” he said during the Q&A session. “There’s no one perfect antidepressant for people with depression associated with Parkinson’s disease. I would make sure to select one that they would tolerate and be willing to take and that doesn’t interfere with their treatment of their movement disorder, and (I would make sure) that there’s no drug-drug interaction,” he said.

Cognitive impairment or dementia is also very common, affecting about 75% of Parkinson’s patients. This can include reduced working memory, learning, and planning, and generally does not manifest until at least 1 year after motor symptoms have begun. Rivastigmine is Food and Drug Administration–approved for treatment of cognitive impairment in Parkinson’s disease.

As many as 60% of Parkinson’s disease patients suffer from psychosis at some point, often visual hallucinations or delusions, which can include beliefs of spousal infidelity.

Many clinicians prescribe quetiapine off label, but there are not compelling data to support that it reduces intensity and frequency of hallucinations and delusions, according to Dr. Citrome. However, it is relatively easy to prescribe, requiring no preauthorizations, it is inexpensive, and it may improve sleep.

The FDA approved pimavanserin in 2016 for hallucinations and delusions in Parkinson’s disease, and it doesn’t worsen motor symptoms, Dr. Citrome said. That’s because pimavanserin is a highly selective antagonist of the 5-HT2A receptor, with no effect on dopaminergic, histaminergic, adrenergic, or muscarinic receptors.

The drug improves positive symptoms beginning at days 29 and 43, compared with placebo. An analysis by Dr. Citrome’s group found a number needed to treat (NNT) of 7 to gain a benefit over placebo if the metric is a ≥ 30% reduction in baseline symptom score. The drug had an NNT of 9 to achieve a ≥ 50% reduction, and an NNT of 5 to achieve a score of much improved or very much improved on the Clinical Global Impression–Improvement (CGI-I) scale. In general, an NNT less than 10 suggests that a drug is clinically useful.

In contrast, the number needed to harm (NNH) represents the number of patients who would need to receive a therapy to add one adverse event, compared with placebo. A number greater than 10 indicates that the therapy may be tolerable.

Using various measures, the NNH was well over 10 for pimavanserin. With respect to somnolence, the NNH over placebo was 138, and for a weight gain of 7% or more, the NNH was 594.

Overall, the study found that 4 patients would need to be treated to achieve a benefit over placebo with respect to a ≥ 3–point improvement in the Scale of Positive Symptoms–Parkinson’s Disease (SAPS-PD), while 21 would need to receive the drug to lead to one additional discontinuation because of an adverse event, compared to placebo.

When researchers compared pimavanserin to off-label use of quetiapine, olanzapine, and clozapine, they found a Cohen’s d value of 0.50, which was better than quetiapine and olanzapine, but lower than for clozapine. However, there is no requirement of blood monitoring, and clozapine can potentially worsen motor symptoms.

Dr. Citrome’s presentation should be a reminder to neurologists that psychiatric disorders are an important patient concern, said Henry A. Nasrallah, MD, professor of psychiatry, neurology, and neuroscience at the University of Cincinnati, who moderated the session.

“I think this serves as a model to recognize that many neurological disorders actually present with numerous psychiatric disorders,” Dr. Nasrallah said during the meeting, presented by MedscapeLive. MedscapeLive and this news organization are owned by the same parent company.

Dr. Citrome has consulted for AbbVie, Acadia, Alkermes, Allergan, Angelini, Astellas, Avanir, Axsome, BioXcel, Boehringer-Ingelheim, Cadent Therapeutics, Eisai, Impel, Intra-Cellular, Janssen, Karuna, Lundbeck, Lyndra, MedAvante-ProPhase, Merck, Neurocrine, Noven, Otsuka, Ovid, Relmada, Sage, Sunovion, and Teva. He has been a speaker for most of those companies, and he holds stock in Bristol Myers Squibb, Eli Lilly, J&J, Merck, and Pfizer.

Dr. Nasrallah has consulted for Acadia, Alkermes, Allergan, Boehringer-Ingelheim, Indivior, Intra-Cellular, Janssen, Neurocrine, Otsuka, Sunovion, and Teva. He has served on a speakers bureau for most of those companies, in addition to that of Noven.

Parkinson’s disease patients who develop anxiety early in their disease are at risk for reduced physical activity, which promotes further anxiety and cognitive decline, data from nearly 500 individuals show.

Anxiety occurs in 20%-60% of Parkinson’s disease (PD) patients but often goes undiagnosed, wrote Jacob D. Jones, PhD, of California State University, San Bernardino, and colleagues.

“Anxiety can attenuate motivation to engage in physical activity leading to more anxiety and other negative cognitive outcomes,” although physical activity has been shown to improve cognitive function in PD patients, they said. However, physical activity as a mediator between anxiety and cognitive function in PD has not been well studied, they noted.

In a study published in Mental Health and Physical Activity the researchers identified 487 adults with newly diagnosed PD within the past 2 years who were enrolled in the Parkinson’s Progression Markers Initiative. Participants were followed for up to 5 years and completed neuropsychological tests, tests of motor severity, and self-reports on anxiety and physical activity. Anxiety was assessed using the State-Trait Anxiety Inventory-Trait (STAI-T) subscale. Physical activity was assessed using the Physical Activity Scale for the Elderly (PASE). Motor severity was assessed using the Unified Parkinson’s Disease Rating Scale-Part III (UPDRS). The average age of the participants was 61 years, 65% were men, and 96% were White.

Using a direct-effect model, the researchers found that individuals whose anxiety increased during the study period also showed signs of cognitive decline. A significant between-person effect showed that individuals who were generally more anxious also scored lower on cognitive tests over the 5-year study period.

In a mediation model computed with structural equation modeling, physical activity mediated the link between anxiety and cognition, most notably household activity.

“There was a significant within-person association between anxiety and household activities, meaning that individuals who became more anxious over the 5-year study also became less active in the home,” reported Dr. Jones and colleagues.

However, no significant indirect effect was noted regarding the between-person findings of the impact of physical activity on anxiety and cognitive decline. Although more severe anxiety was associated with less activity, cognitive performance was not associated with either type of physical activity.

The presence of a within-person effect “suggests that reductions in physical activity, specifically within the first 5 years of disease onset, may be detrimental to mental health,” the researchers emphasized. Given that the study population was newly diagnosed with PD “it is likely the within-person terms are more sensitive to changes in anxiety, physical activity, and cognition that are more directly the result of the PD process, as opposed to lifestyle/preexisting traits,” they said.

The study findings were limited by several factors, including the use of self-reports to measure physical activity, and the lack of granular information about the details of physical activity, the researchers noted. Another limitation was the inclusion of only newly diagnosed PD patients, which might limit generalizability.

“Future research is warranted to understand if other modes, intensities, or complexities of physical activity impact individuals with PD in a different manner in relation to cognition,” they said.

Dr. Jones and colleagues had no disclosures. The PPMI is supported by the Michael J. Fox Foundation for Parkinson’s Research and funding partners, including numerous pharmaceutical companies.

Parkinson’s disease patients who develop anxiety early in their disease are at risk for reduced physical activity, which promotes further anxiety and cognitive decline, data from nearly 500 individuals show.

Anxiety occurs in 20%-60% of Parkinson’s disease (PD) patients but often goes undiagnosed, wrote Jacob D. Jones, PhD, of California State University, San Bernardino, and colleagues.

“Anxiety can attenuate motivation to engage in physical activity leading to more anxiety and other negative cognitive outcomes,” although physical activity has been shown to improve cognitive function in PD patients, they said. However, physical activity as a mediator between anxiety and cognitive function in PD has not been well studied, they noted.

In a study published in Mental Health and Physical Activity the researchers identified 487 adults with newly diagnosed PD within the past 2 years who were enrolled in the Parkinson’s Progression Markers Initiative. Participants were followed for up to 5 years and completed neuropsychological tests, tests of motor severity, and self-reports on anxiety and physical activity. Anxiety was assessed using the State-Trait Anxiety Inventory-Trait (STAI-T) subscale. Physical activity was assessed using the Physical Activity Scale for the Elderly (PASE). Motor severity was assessed using the Unified Parkinson’s Disease Rating Scale-Part III (UPDRS). The average age of the participants was 61 years, 65% were men, and 96% were White.

Using a direct-effect model, the researchers found that individuals whose anxiety increased during the study period also showed signs of cognitive decline. A significant between-person effect showed that individuals who were generally more anxious also scored lower on cognitive tests over the 5-year study period.

In a mediation model computed with structural equation modeling, physical activity mediated the link between anxiety and cognition, most notably household activity.

“There was a significant within-person association between anxiety and household activities, meaning that individuals who became more anxious over the 5-year study also became less active in the home,” reported Dr. Jones and colleagues.

However, no significant indirect effect was noted regarding the between-person findings of the impact of physical activity on anxiety and cognitive decline. Although more severe anxiety was associated with less activity, cognitive performance was not associated with either type of physical activity.

The presence of a within-person effect “suggests that reductions in physical activity, specifically within the first 5 years of disease onset, may be detrimental to mental health,” the researchers emphasized. Given that the study population was newly diagnosed with PD “it is likely the within-person terms are more sensitive to changes in anxiety, physical activity, and cognition that are more directly the result of the PD process, as opposed to lifestyle/preexisting traits,” they said.

The study findings were limited by several factors, including the use of self-reports to measure physical activity, and the lack of granular information about the details of physical activity, the researchers noted. Another limitation was the inclusion of only newly diagnosed PD patients, which might limit generalizability.

“Future research is warranted to understand if other modes, intensities, or complexities of physical activity impact individuals with PD in a different manner in relation to cognition,” they said.

Dr. Jones and colleagues had no disclosures. The PPMI is supported by the Michael J. Fox Foundation for Parkinson’s Research and funding partners, including numerous pharmaceutical companies.

Parkinson’s disease patients who develop anxiety early in their disease are at risk for reduced physical activity, which promotes further anxiety and cognitive decline, data from nearly 500 individuals show.

Anxiety occurs in 20%-60% of Parkinson’s disease (PD) patients but often goes undiagnosed, wrote Jacob D. Jones, PhD, of California State University, San Bernardino, and colleagues.

“Anxiety can attenuate motivation to engage in physical activity leading to more anxiety and other negative cognitive outcomes,” although physical activity has been shown to improve cognitive function in PD patients, they said. However, physical activity as a mediator between anxiety and cognitive function in PD has not been well studied, they noted.

In a study published in Mental Health and Physical Activity the researchers identified 487 adults with newly diagnosed PD within the past 2 years who were enrolled in the Parkinson’s Progression Markers Initiative. Participants were followed for up to 5 years and completed neuropsychological tests, tests of motor severity, and self-reports on anxiety and physical activity. Anxiety was assessed using the State-Trait Anxiety Inventory-Trait (STAI-T) subscale. Physical activity was assessed using the Physical Activity Scale for the Elderly (PASE). Motor severity was assessed using the Unified Parkinson’s Disease Rating Scale-Part III (UPDRS). The average age of the participants was 61 years, 65% were men, and 96% were White.

Using a direct-effect model, the researchers found that individuals whose anxiety increased during the study period also showed signs of cognitive decline. A significant between-person effect showed that individuals who were generally more anxious also scored lower on cognitive tests over the 5-year study period.

In a mediation model computed with structural equation modeling, physical activity mediated the link between anxiety and cognition, most notably household activity.

“There was a significant within-person association between anxiety and household activities, meaning that individuals who became more anxious over the 5-year study also became less active in the home,” reported Dr. Jones and colleagues.

However, no significant indirect effect was noted regarding the between-person findings of the impact of physical activity on anxiety and cognitive decline. Although more severe anxiety was associated with less activity, cognitive performance was not associated with either type of physical activity.

The presence of a within-person effect “suggests that reductions in physical activity, specifically within the first 5 years of disease onset, may be detrimental to mental health,” the researchers emphasized. Given that the study population was newly diagnosed with PD “it is likely the within-person terms are more sensitive to changes in anxiety, physical activity, and cognition that are more directly the result of the PD process, as opposed to lifestyle/preexisting traits,” they said.

The study findings were limited by several factors, including the use of self-reports to measure physical activity, and the lack of granular information about the details of physical activity, the researchers noted. Another limitation was the inclusion of only newly diagnosed PD patients, which might limit generalizability.

“Future research is warranted to understand if other modes, intensities, or complexities of physical activity impact individuals with PD in a different manner in relation to cognition,” they said.

Dr. Jones and colleagues had no disclosures. The PPMI is supported by the Michael J. Fox Foundation for Parkinson’s Research and funding partners, including numerous pharmaceutical companies.

Adults aged 65 years and older who develop psychotic manifestations are significantly more likely than those without such manifestations to develop prodromal Parkinson’s disease, data from 925 individuals suggest.

“The presence of perceptual abnormalities and/or delusional ideation among community-dwelling elderly individuals is more widespread than considered in the past,” wrote Ioanna Pachi, MD, of National and Kapodistrian University of Athens Medical School and colleagues. However, those psychoses and their potential impact on prodromal Parkinson’s disease (PD) have not been well studied in community-dwelling populations, they noted in the study, published in Parkinsonism and Related Disorders.

In the study, Dr. Pachi and colleagues reviewed data from 914 participants in the Hellenic Longitudinal Investigation of Aging and Diet study (HELIAD), a cross-sectional, population-based cohort study of older adults in Greece. The average age of the participants was 76 years, and 41% were men. Participants had no delusional features at baseline; delusional features were assessed using the Neuropsychiatric Inventory scale and the Columbia University Scale for Psychopathology in Alzheimer’s disease. The researchers calculated the probability of prodromal PD (pPD) for each participant based on the 2019 International Parkinson and Movement Disorders Society research criteria for prodromal PD.

Over a 3-year follow-up period, 20 participants developed psychotic manifestations and were 1.3 times more likely to have pPD, compared with those without psychoses (P = .006). Those with new-onset psychotic features were categorized together as the NPSY group, regardless of symptom severity or frequency; those with no symptoms at either baseline or during follow-up were categorized as unaffected (UPSY). Most of the NPSY participants showed isolated delusional features, although some expressed hallucinations. Most symptoms were mild.

New-onset psychosis was associated with a fivefold increased risk of both subthreshold parkinsonism and depression (adjusted odds ratios, 4.5 and 5.0, respectively) and with a threefold increased risk of constipation (aOR 2.6). Other factors, including nonsmoking, global cognitive deficit, and anxiety were not significantly associated with new-onset psychotic symptoms after adjusting for confounding factors.

Although the mechanism behind the association remains unclear, “the parallel evolution of psychotic features and prodromal PD could be related to the spreading pattern of neuronal damage that occurs in PD,” the researchers wrote.

The study findings were limited by several factors, including the administration of neuropsychiatric questionnaires by nonpsychiatrists, and lack of detailed psychiatric history, including complete information on medication use, the researchers noted. The small size of the NPSY group also prevented evaluation of the potential associations between pPD and different modalities of hallucinations, they said.

However, the results were strengthened by the overall large and population-based sample size, and the comprehensive evaluation of psychotic features, they wrote. More follow-up evaluations in the HELIAD cohort are planned to further explore the underlying mechanism of the association between late-life psychosis and pPD.

“Provided that these results are confirmed in other community cohorts of elderly subjects, psychotic features may be added to the list of manifestations of pPD,” they concluded.

The study was supported in part by grants from the Alzheimer’s Association, ARISTEIA, and the ESPA-EU program Excellence Grant. It was cofunded by the European Social Fund and Greek National resources, the Ministry for Health and Social Solidarity, Greece, and the Greek State Scholarships Foundation. Dr. Pachi had no disclosures.

Adults aged 65 years and older who develop psychotic manifestations are significantly more likely than those without such manifestations to develop prodromal Parkinson’s disease, data from 925 individuals suggest.

“The presence of perceptual abnormalities and/or delusional ideation among community-dwelling elderly individuals is more widespread than considered in the past,” wrote Ioanna Pachi, MD, of National and Kapodistrian University of Athens Medical School and colleagues. However, those psychoses and their potential impact on prodromal Parkinson’s disease (PD) have not been well studied in community-dwelling populations, they noted in the study, published in Parkinsonism and Related Disorders.

In the study, Dr. Pachi and colleagues reviewed data from 914 participants in the Hellenic Longitudinal Investigation of Aging and Diet study (HELIAD), a cross-sectional, population-based cohort study of older adults in Greece. The average age of the participants was 76 years, and 41% were men. Participants had no delusional features at baseline; delusional features were assessed using the Neuropsychiatric Inventory scale and the Columbia University Scale for Psychopathology in Alzheimer’s disease. The researchers calculated the probability of prodromal PD (pPD) for each participant based on the 2019 International Parkinson and Movement Disorders Society research criteria for prodromal PD.

Over a 3-year follow-up period, 20 participants developed psychotic manifestations and were 1.3 times more likely to have pPD, compared with those without psychoses (P = .006). Those with new-onset psychotic features were categorized together as the NPSY group, regardless of symptom severity or frequency; those with no symptoms at either baseline or during follow-up were categorized as unaffected (UPSY). Most of the NPSY participants showed isolated delusional features, although some expressed hallucinations. Most symptoms were mild.

New-onset psychosis was associated with a fivefold increased risk of both subthreshold parkinsonism and depression (adjusted odds ratios, 4.5 and 5.0, respectively) and with a threefold increased risk of constipation (aOR 2.6). Other factors, including nonsmoking, global cognitive deficit, and anxiety were not significantly associated with new-onset psychotic symptoms after adjusting for confounding factors.

Although the mechanism behind the association remains unclear, “the parallel evolution of psychotic features and prodromal PD could be related to the spreading pattern of neuronal damage that occurs in PD,” the researchers wrote.

The study findings were limited by several factors, including the administration of neuropsychiatric questionnaires by nonpsychiatrists, and lack of detailed psychiatric history, including complete information on medication use, the researchers noted. The small size of the NPSY group also prevented evaluation of the potential associations between pPD and different modalities of hallucinations, they said.

However, the results were strengthened by the overall large and population-based sample size, and the comprehensive evaluation of psychotic features, they wrote. More follow-up evaluations in the HELIAD cohort are planned to further explore the underlying mechanism of the association between late-life psychosis and pPD.

“Provided that these results are confirmed in other community cohorts of elderly subjects, psychotic features may be added to the list of manifestations of pPD,” they concluded.

The study was supported in part by grants from the Alzheimer’s Association, ARISTEIA, and the ESPA-EU program Excellence Grant. It was cofunded by the European Social Fund and Greek National resources, the Ministry for Health and Social Solidarity, Greece, and the Greek State Scholarships Foundation. Dr. Pachi had no disclosures.

Adults aged 65 years and older who develop psychotic manifestations are significantly more likely than those without such manifestations to develop prodromal Parkinson’s disease, data from 925 individuals suggest.

“The presence of perceptual abnormalities and/or delusional ideation among community-dwelling elderly individuals is more widespread than considered in the past,” wrote Ioanna Pachi, MD, of National and Kapodistrian University of Athens Medical School and colleagues. However, those psychoses and their potential impact on prodromal Parkinson’s disease (PD) have not been well studied in community-dwelling populations, they noted in the study, published in Parkinsonism and Related Disorders.

In the study, Dr. Pachi and colleagues reviewed data from 914 participants in the Hellenic Longitudinal Investigation of Aging and Diet study (HELIAD), a cross-sectional, population-based cohort study of older adults in Greece. The average age of the participants was 76 years, and 41% were men. Participants had no delusional features at baseline; delusional features were assessed using the Neuropsychiatric Inventory scale and the Columbia University Scale for Psychopathology in Alzheimer’s disease. The researchers calculated the probability of prodromal PD (pPD) for each participant based on the 2019 International Parkinson and Movement Disorders Society research criteria for prodromal PD.

Over a 3-year follow-up period, 20 participants developed psychotic manifestations and were 1.3 times more likely to have pPD, compared with those without psychoses (P = .006). Those with new-onset psychotic features were categorized together as the NPSY group, regardless of symptom severity or frequency; those with no symptoms at either baseline or during follow-up were categorized as unaffected (UPSY). Most of the NPSY participants showed isolated delusional features, although some expressed hallucinations. Most symptoms were mild.

New-onset psychosis was associated with a fivefold increased risk of both subthreshold parkinsonism and depression (adjusted odds ratios, 4.5 and 5.0, respectively) and with a threefold increased risk of constipation (aOR 2.6). Other factors, including nonsmoking, global cognitive deficit, and anxiety were not significantly associated with new-onset psychotic symptoms after adjusting for confounding factors.

Although the mechanism behind the association remains unclear, “the parallel evolution of psychotic features and prodromal PD could be related to the spreading pattern of neuronal damage that occurs in PD,” the researchers wrote.

The study findings were limited by several factors, including the administration of neuropsychiatric questionnaires by nonpsychiatrists, and lack of detailed psychiatric history, including complete information on medication use, the researchers noted. The small size of the NPSY group also prevented evaluation of the potential associations between pPD and different modalities of hallucinations, they said.

However, the results were strengthened by the overall large and population-based sample size, and the comprehensive evaluation of psychotic features, they wrote. More follow-up evaluations in the HELIAD cohort are planned to further explore the underlying mechanism of the association between late-life psychosis and pPD.

“Provided that these results are confirmed in other community cohorts of elderly subjects, psychotic features may be added to the list of manifestations of pPD,” they concluded.

The study was supported in part by grants from the Alzheimer’s Association, ARISTEIA, and the ESPA-EU program Excellence Grant. It was cofunded by the European Social Fund and Greek National resources, the Ministry for Health and Social Solidarity, Greece, and the Greek State Scholarships Foundation. Dr. Pachi had no disclosures.

Pimavanserin, a novel antipsychotic drug used to manage hallucinations and delusions in Parkinson’s disease, may lead to increased hospitalizations and deaths, according to a new study.

A retrospective cohort study of elderly patients with Parkinson’s disease who were in long-term care facilities found that the use of pimavanserin (Nuplazid) was associated with an increased risk of 30-day hospitalization and mortality for up to a year.

“Given that a previous study showed typical and atypical antipsychotics more than doubled mortality risk in patients with Parkinson’s disease, we aimed to assess the risk of hospitalization and death associated with pimavanserin,” wrote lead author Y. Joseph Hwang, MD, Johns Hopkins University, Baltimore, and colleagues in the paper. “These findings, in a large real-world cohort within long-term care facilities, may help to inform decisions regarding its risk-benefit balance among patients with Parkinson’s disease.”

The findings were published online Aug. 13 in Neurology.

The researchers enrolled 2,186 patients with Parkinson’s disease aged 65 years and older in Medicare-certified long-term care facilities who also had a pimavanserin prescription and 18,212 nonusers of pimavanserin between Nov. 1, 2015, and December 31, 2018. Patients in the pimavanserin group used the drug over the course of the entire study period. Hospitalization and mortality were calculated from the date of pimavanserin prescription. Propensity score–based inverse probability of treatment weighting (IPTW) was used to balance the two groups on 24 baseline characteristics such as age, sex, and comorbidities.

Pimavanserin use was associated with a 24% higher risk of 30-day hospitalization (adjusted hazard ratio, 1.24; 95% confidence interval, 1.06-1.43). However, “the association did not reach statistical significance in a smaller subcohort of propensity score-matched users and nonusers,” Dr. Hwang and colleagues wrote.

Pimavanserin use was also linked to higher mortality at:

• 90 days (aHR, 1.20; 95% CI, 1.02-1.41).
• 180 days (aHR, 1.28; 95% CI, 1.13-1.45).
• 365 days (aHR, 1.56; 95% CI, 1.42-1.72).

No associations were found between pimavanserin use and 90-day hospitalization (aHR, 1.10; 95% CI, 0.99-1.24) nor with 30-day mortality (aHR, 0.76; 95% CI, 0.56-1.03).
 

Important considerations

“This study raises three important points to consider for any practicing neurology provider: 1) how to address and interpret risks associated with pimavanserin use in this patient population 2) utility of pimavanserin 3) interpretation of data showing increased mortality in patients being treated for Parkinson’s disease psychosis,” wrote Farwa Ali, MBBS, of the Mayo Clinic, Rochester, Minn., in an accompanying editorial published in Neurology.

Hallucinations and delusions are highly prevalent in Parkinson’s disease; as many as 60% of patients will develop psychosis over the course of their illness. Pimavanserin is a selective serotonin inverse agonist which targets 5-HT_2A serotonin receptors in the brain, decreasing their activity in order to attenuate hallucinations and delusions.

“Pimavanserin has been approved by the FDA [Food and Drug Administration] for Parkinson’s disease psychosis, but its safety has been called into question based on previous reports of increased mortality risk, compared with a rather modest benefit seen in a 6-week clinical trial, the duration of which limits determination of long-term safety,” wrote Dr. Ali.

Pimavanserin carries a boxed warning that elderly patients with dementia may be at an increased risk of death. After its approval in 2016, the U.S. FDA later reviewed 893 deaths in association with pimavanserin during the postmarketing surveillance period – “an unexpected number in a new drug,” Dr. Hwang and colleagues noted. “It [the FDA] noted that most reports occurred in a population with high underlying death rates and did not signal any additional risk beyond the current warning for all antipsychotics, which could have resulted in annual mortality rates of up to 60%.”

As the first cohort study to examine hospitalization and death between pimavanserin users and nonusers, “the study confirms previous concerns regarding safety of pimavanserin and more importantly brings to attention the importance of carefully considering risks and benefits of pharmacotherapy in Parkinson’s disease psychosis, clear communication with patients and families, and close observation to ensure safety,” wrote Dr. Ali.

The study limitations include its observational design, which subjected the findings to residual confounding.

“While we developed models to maximize the strength of causal inference, our comparison group was pimavanserin nonusers and the very reason for prescription of pimavanserin could have predisposed its users to the outcomes of hospitalization and death, introducing confounding by indication,” Dr. Hwang and colleagues wrote in the paper.

Additionally, “while robust analyses were conducted to ensure pimavanserin users and nonusers were comparable, Dr. Hwang et al. did find that pimavanserin users were more likely to concomitantly use other antipsychotic drugs which has been demonstrated as increasing the mortality risk,” Dr. Ali pointed out.

Since patients living in long-term care facilities may have a higher risk of mortality because of more severe or later-stage Parkinson’s disease, the study results “may not be generalizable to community-dwelling PD patients,” Dr. Ali wrote. “These factors are important to consider while making individual management decisions.”

Dr. Hwang and Dr. Ali disclosed no relevant financial relationships. The study authors reported no targeted funding.

Pimavanserin, a novel antipsychotic drug used to manage hallucinations and delusions in Parkinson’s disease, may lead to increased hospitalizations and deaths, according to a new study.

A retrospective cohort study of elderly patients with Parkinson’s disease who were in long-term care facilities found that the use of pimavanserin (Nuplazid) was associated with an increased risk of 30-day hospitalization and mortality for up to a year.

“Given that a previous study showed typical and atypical antipsychotics more than doubled mortality risk in patients with Parkinson’s disease, we aimed to assess the risk of hospitalization and death associated with pimavanserin,” wrote lead author Y. Joseph Hwang, MD, Johns Hopkins University, Baltimore, and colleagues in the paper. “These findings, in a large real-world cohort within long-term care facilities, may help to inform decisions regarding its risk-benefit balance among patients with Parkinson’s disease.”

The findings were published online Aug. 13 in Neurology.

The researchers enrolled 2,186 patients with Parkinson’s disease aged 65 years and older in Medicare-certified long-term care facilities who also had a pimavanserin prescription and 18,212 nonusers of pimavanserin between Nov. 1, 2015, and December 31, 2018. Patients in the pimavanserin group used the drug over the course of the entire study period. Hospitalization and mortality were calculated from the date of pimavanserin prescription. Propensity score–based inverse probability of treatment weighting (IPTW) was used to balance the two groups on 24 baseline characteristics such as age, sex, and comorbidities.

Pimavanserin use was associated with a 24% higher risk of 30-day hospitalization (adjusted hazard ratio, 1.24; 95% confidence interval, 1.06-1.43). However, “the association did not reach statistical significance in a smaller subcohort of propensity score-matched users and nonusers,” Dr. Hwang and colleagues wrote.

Pimavanserin use was also linked to higher mortality at:

• 90 days (aHR, 1.20; 95% CI, 1.02-1.41).
• 180 days (aHR, 1.28; 95% CI, 1.13-1.45).
• 365 days (aHR, 1.56; 95% CI, 1.42-1.72).

No associations were found between pimavanserin use and 90-day hospitalization (aHR, 1.10; 95% CI, 0.99-1.24) nor with 30-day mortality (aHR, 0.76; 95% CI, 0.56-1.03).
 

Important considerations

“This study raises three important points to consider for any practicing neurology provider: 1) how to address and interpret risks associated with pimavanserin use in this patient population 2) utility of pimavanserin 3) interpretation of data showing increased mortality in patients being treated for Parkinson’s disease psychosis,” wrote Farwa Ali, MBBS, of the Mayo Clinic, Rochester, Minn., in an accompanying editorial published in Neurology.

Hallucinations and delusions are highly prevalent in Parkinson’s disease; as many as 60% of patients will develop psychosis over the course of their illness. Pimavanserin is a selective serotonin inverse agonist which targets 5-HT_2A serotonin receptors in the brain, decreasing their activity in order to attenuate hallucinations and delusions.

“Pimavanserin has been approved by the FDA [Food and Drug Administration] for Parkinson’s disease psychosis, but its safety has been called into question based on previous reports of increased mortality risk, compared with a rather modest benefit seen in a 6-week clinical trial, the duration of which limits determination of long-term safety,” wrote Dr. Ali.

Pimavanserin carries a boxed warning that elderly patients with dementia may be at an increased risk of death. After its approval in 2016, the U.S. FDA later reviewed 893 deaths in association with pimavanserin during the postmarketing surveillance period – “an unexpected number in a new drug,” Dr. Hwang and colleagues noted. “It [the FDA] noted that most reports occurred in a population with high underlying death rates and did not signal any additional risk beyond the current warning for all antipsychotics, which could have resulted in annual mortality rates of up to 60%.”

As the first cohort study to examine hospitalization and death between pimavanserin users and nonusers, “the study confirms previous concerns regarding safety of pimavanserin and more importantly brings to attention the importance of carefully considering risks and benefits of pharmacotherapy in Parkinson’s disease psychosis, clear communication with patients and families, and close observation to ensure safety,” wrote Dr. Ali.

The study limitations include its observational design, which subjected the findings to residual confounding.

“While we developed models to maximize the strength of causal inference, our comparison group was pimavanserin nonusers and the very reason for prescription of pimavanserin could have predisposed its users to the outcomes of hospitalization and death, introducing confounding by indication,” Dr. Hwang and colleagues wrote in the paper.

Additionally, “while robust analyses were conducted to ensure pimavanserin users and nonusers were comparable, Dr. Hwang et al. did find that pimavanserin users were more likely to concomitantly use other antipsychotic drugs which has been demonstrated as increasing the mortality risk,” Dr. Ali pointed out.

Since patients living in long-term care facilities may have a higher risk of mortality because of more severe or later-stage Parkinson’s disease, the study results “may not be generalizable to community-dwelling PD patients,” Dr. Ali wrote. “These factors are important to consider while making individual management decisions.”

Dr. Hwang and Dr. Ali disclosed no relevant financial relationships. The study authors reported no targeted funding.

Pimavanserin, a novel antipsychotic drug used to manage hallucinations and delusions in Parkinson’s disease, may lead to increased hospitalizations and deaths, according to a new study.

A retrospective cohort study of elderly patients with Parkinson’s disease who were in long-term care facilities found that the use of pimavanserin (Nuplazid) was associated with an increased risk of 30-day hospitalization and mortality for up to a year.

“Given that a previous study showed typical and atypical antipsychotics more than doubled mortality risk in patients with Parkinson’s disease, we aimed to assess the risk of hospitalization and death associated with pimavanserin,” wrote lead author Y. Joseph Hwang, MD, Johns Hopkins University, Baltimore, and colleagues in the paper. “These findings, in a large real-world cohort within long-term care facilities, may help to inform decisions regarding its risk-benefit balance among patients with Parkinson’s disease.”

The findings were published online Aug. 13 in Neurology.

The researchers enrolled 2,186 patients with Parkinson’s disease aged 65 years and older in Medicare-certified long-term care facilities who also had a pimavanserin prescription and 18,212 nonusers of pimavanserin between Nov. 1, 2015, and December 31, 2018. Patients in the pimavanserin group used the drug over the course of the entire study period. Hospitalization and mortality were calculated from the date of pimavanserin prescription. Propensity score–based inverse probability of treatment weighting (IPTW) was used to balance the two groups on 24 baseline characteristics such as age, sex, and comorbidities.

Pimavanserin use was associated with a 24% higher risk of 30-day hospitalization (adjusted hazard ratio, 1.24; 95% confidence interval, 1.06-1.43). However, “the association did not reach statistical significance in a smaller subcohort of propensity score-matched users and nonusers,” Dr. Hwang and colleagues wrote.

Pimavanserin use was also linked to higher mortality at:

• 90 days (aHR, 1.20; 95% CI, 1.02-1.41).
• 180 days (aHR, 1.28; 95% CI, 1.13-1.45).
• 365 days (aHR, 1.56; 95% CI, 1.42-1.72).

No associations were found between pimavanserin use and 90-day hospitalization (aHR, 1.10; 95% CI, 0.99-1.24) nor with 30-day mortality (aHR, 0.76; 95% CI, 0.56-1.03).
 

Important considerations

“This study raises three important points to consider for any practicing neurology provider: 1) how to address and interpret risks associated with pimavanserin use in this patient population 2) utility of pimavanserin 3) interpretation of data showing increased mortality in patients being treated for Parkinson’s disease psychosis,” wrote Farwa Ali, MBBS, of the Mayo Clinic, Rochester, Minn., in an accompanying editorial published in Neurology.

Hallucinations and delusions are highly prevalent in Parkinson’s disease; as many as 60% of patients will develop psychosis over the course of their illness. Pimavanserin is a selective serotonin inverse agonist which targets 5-HT_2A serotonin receptors in the brain, decreasing their activity in order to attenuate hallucinations and delusions.

“Pimavanserin has been approved by the FDA [Food and Drug Administration] for Parkinson’s disease psychosis, but its safety has been called into question based on previous reports of increased mortality risk, compared with a rather modest benefit seen in a 6-week clinical trial, the duration of which limits determination of long-term safety,” wrote Dr. Ali.

Pimavanserin carries a boxed warning that elderly patients with dementia may be at an increased risk of death. After its approval in 2016, the U.S. FDA later reviewed 893 deaths in association with pimavanserin during the postmarketing surveillance period – “an unexpected number in a new drug,” Dr. Hwang and colleagues noted. “It [the FDA] noted that most reports occurred in a population with high underlying death rates and did not signal any additional risk beyond the current warning for all antipsychotics, which could have resulted in annual mortality rates of up to 60%.”

As the first cohort study to examine hospitalization and death between pimavanserin users and nonusers, “the study confirms previous concerns regarding safety of pimavanserin and more importantly brings to attention the importance of carefully considering risks and benefits of pharmacotherapy in Parkinson’s disease psychosis, clear communication with patients and families, and close observation to ensure safety,” wrote Dr. Ali.

The study limitations include its observational design, which subjected the findings to residual confounding.

“While we developed models to maximize the strength of causal inference, our comparison group was pimavanserin nonusers and the very reason for prescription of pimavanserin could have predisposed its users to the outcomes of hospitalization and death, introducing confounding by indication,” Dr. Hwang and colleagues wrote in the paper.

Additionally, “while robust analyses were conducted to ensure pimavanserin users and nonusers were comparable, Dr. Hwang et al. did find that pimavanserin users were more likely to concomitantly use other antipsychotic drugs which has been demonstrated as increasing the mortality risk,” Dr. Ali pointed out.

Since patients living in long-term care facilities may have a higher risk of mortality because of more severe or later-stage Parkinson’s disease, the study results “may not be generalizable to community-dwelling PD patients,” Dr. Ali wrote. “These factors are important to consider while making individual management decisions.”

Dr. Hwang and Dr. Ali disclosed no relevant financial relationships. The study authors reported no targeted funding.

Most adults with functional motor disorders (FMDs) report a history of psychological or physical trauma 6 months before the onset of symptoms, a retrospective study of 482 individuals suggests. Those challenges prevent more than half of those patients – most of whom are women – from working, the researchers found.

“This finding points to the huge socioeconomical burden of FMD and emphasizes the need for better diagnostic procedure and active management,” wrote Béatrice Garcin, MD, of Sorbonne Université, Paris, and associates.

FMDs are a common presentation of functional neurologic disorders, but clinical characteristics of FMDs are not well understood because large series of consecutive patients are limited, Dr. Garcin and associates said.

In the study, published in the Journal of Psychosomatic Research, the investigators reviewed data from consecutive patients with FMD who were seen at a single hospital in France between 2008 and 2016. Half of the patients had functional motor weakness (241) and half had functional movement disorders (241). All of the patients had been referred for transcranial magnetic stimulation (TMS) as treatment for FMD.

The median age of the patients was 40 years, the median age at the onset of symptoms was 35.5 years, and 74% were women. The most common clinical presentations were tremor and dystonia (83.4%), and no demographic differences were observed between patients with functional motor weakness and functional movement disorders. Symptoms were bilateral in about half of the patients (51.7%), with left- and right-sided symptoms in 28.2% and 20.1%, respectively.

More than 80% of the patients reported a history of trauma within 6 months of the onset of their symptoms, mainly psychological trauma (50.6%). Another 20.1% reported a physical trauma, and 8.7% reported trauma from surgical procedures.

In addition, about two-thirds (66.4%) had psychiatric comorbidities; 52.7% of these were mood disorders: 49.3% depression and 3.3% bipolar disorder. “However, these results about psychiatric comorbidities should be taken with caution,” the researchers emphasized. “The proportion of trauma and psychiatric comorbidities might be significantly underestimated, and psychiatric diagnosis may lack precision because of the absence of systematic psychiatric interviews and psychiatric questionnaires in the present study.”

No significant differences appeared between the motor weakness and movement disorders groups in terms of occupation, level of education, medical somatic history, symptom onset, psychiatric comorbidities, or self-reported history of trauma. Patients in the motor weakness group were significantly younger at the time of TMS treatment and had a shorter disease duration prior to that treatment. No differences were noted between the groups with regard to clinical FMD phenotypes.

The study findings were limited by several factors, including the potential selection bias because of enrollment at a neurology referral center, lack of a control group, and underrepresentation of children and older adults, the researchers noted. Also, symptom severity was not assessed and could not be compared among phenotypes or demographic groups.

However, the results contribute to the characterization of FMD patients. “Future studies are needed to clarify the characteristics of FMD patients and the consequences of their symptoms on disability and work status,” they said.

The study received no outside funding. Lead author Dr. Garcin had no disclosures.

Most adults with functional motor disorders (FMDs) report a history of psychological or physical trauma 6 months before the onset of symptoms, a retrospective study of 482 individuals suggests. Those challenges prevent more than half of those patients – most of whom are women – from working, the researchers found.

“This finding points to the huge socioeconomical burden of FMD and emphasizes the need for better diagnostic procedure and active management,” wrote Béatrice Garcin, MD, of Sorbonne Université, Paris, and associates.

FMDs are a common presentation of functional neurologic disorders, but clinical characteristics of FMDs are not well understood because large series of consecutive patients are limited, Dr. Garcin and associates said.

In the study, published in the Journal of Psychosomatic Research, the investigators reviewed data from consecutive patients with FMD who were seen at a single hospital in France between 2008 and 2016. Half of the patients had functional motor weakness (241) and half had functional movement disorders (241). All of the patients had been referred for transcranial magnetic stimulation (TMS) as treatment for FMD.

The median age of the patients was 40 years, the median age at the onset of symptoms was 35.5 years, and 74% were women. The most common clinical presentations were tremor and dystonia (83.4%), and no demographic differences were observed between patients with functional motor weakness and functional movement disorders. Symptoms were bilateral in about half of the patients (51.7%), with left- and right-sided symptoms in 28.2% and 20.1%, respectively.

More than 80% of the patients reported a history of trauma within 6 months of the onset of their symptoms, mainly psychological trauma (50.6%). Another 20.1% reported a physical trauma, and 8.7% reported trauma from surgical procedures.

In addition, about two-thirds (66.4%) had psychiatric comorbidities; 52.7% of these were mood disorders: 49.3% depression and 3.3% bipolar disorder. “However, these results about psychiatric comorbidities should be taken with caution,” the researchers emphasized. “The proportion of trauma and psychiatric comorbidities might be significantly underestimated, and psychiatric diagnosis may lack precision because of the absence of systematic psychiatric interviews and psychiatric questionnaires in the present study.”

No significant differences appeared between the motor weakness and movement disorders groups in terms of occupation, level of education, medical somatic history, symptom onset, psychiatric comorbidities, or self-reported history of trauma. Patients in the motor weakness group were significantly younger at the time of TMS treatment and had a shorter disease duration prior to that treatment. No differences were noted between the groups with regard to clinical FMD phenotypes.

The study findings were limited by several factors, including the potential selection bias because of enrollment at a neurology referral center, lack of a control group, and underrepresentation of children and older adults, the researchers noted. Also, symptom severity was not assessed and could not be compared among phenotypes or demographic groups.

However, the results contribute to the characterization of FMD patients. “Future studies are needed to clarify the characteristics of FMD patients and the consequences of their symptoms on disability and work status,” they said.

The study received no outside funding. Lead author Dr. Garcin had no disclosures.

Most adults with functional motor disorders (FMDs) report a history of psychological or physical trauma 6 months before the onset of symptoms, a retrospective study of 482 individuals suggests. Those challenges prevent more than half of those patients – most of whom are women – from working, the researchers found.

“This finding points to the huge socioeconomical burden of FMD and emphasizes the need for better diagnostic procedure and active management,” wrote Béatrice Garcin, MD, of Sorbonne Université, Paris, and associates.

FMDs are a common presentation of functional neurologic disorders, but clinical characteristics of FMDs are not well understood because large series of consecutive patients are limited, Dr. Garcin and associates said.

In the study, published in the Journal of Psychosomatic Research, the investigators reviewed data from consecutive patients with FMD who were seen at a single hospital in France between 2008 and 2016. Half of the patients had functional motor weakness (241) and half had functional movement disorders (241). All of the patients had been referred for transcranial magnetic stimulation (TMS) as treatment for FMD.

The median age of the patients was 40 years, the median age at the onset of symptoms was 35.5 years, and 74% were women. The most common clinical presentations were tremor and dystonia (83.4%), and no demographic differences were observed between patients with functional motor weakness and functional movement disorders. Symptoms were bilateral in about half of the patients (51.7%), with left- and right-sided symptoms in 28.2% and 20.1%, respectively.

More than 80% of the patients reported a history of trauma within 6 months of the onset of their symptoms, mainly psychological trauma (50.6%). Another 20.1% reported a physical trauma, and 8.7% reported trauma from surgical procedures.

In addition, about two-thirds (66.4%) had psychiatric comorbidities; 52.7% of these were mood disorders: 49.3% depression and 3.3% bipolar disorder. “However, these results about psychiatric comorbidities should be taken with caution,” the researchers emphasized. “The proportion of trauma and psychiatric comorbidities might be significantly underestimated, and psychiatric diagnosis may lack precision because of the absence of systematic psychiatric interviews and psychiatric questionnaires in the present study.”

No significant differences appeared between the motor weakness and movement disorders groups in terms of occupation, level of education, medical somatic history, symptom onset, psychiatric comorbidities, or self-reported history of trauma. Patients in the motor weakness group were significantly younger at the time of TMS treatment and had a shorter disease duration prior to that treatment. No differences were noted between the groups with regard to clinical FMD phenotypes.

The study findings were limited by several factors, including the potential selection bias because of enrollment at a neurology referral center, lack of a control group, and underrepresentation of children and older adults, the researchers noted. Also, symptom severity was not assessed and could not be compared among phenotypes or demographic groups.

However, the results contribute to the characterization of FMD patients. “Future studies are needed to clarify the characteristics of FMD patients and the consequences of their symptoms on disability and work status,” they said.

The study received no outside funding. Lead author Dr. Garcin had no disclosures.

Older adults with hearing impairment tend to have poorer physical function, less walking endurance, and faster declines in physical function compared with older adults with normal hearing, according to a study published online in JAMA Network Open.

Hearing loss is associated with slower gait and, in particular, worse balance, the data suggest.

“Because hearing impairment is amenable to prevention and management, it potentially serves as a target for interventions to slow physical decline with aging,” the researchers said.

To examine how hearing impairment relates to physical function in older adults, Pablo Martinez-Amezcua, MD, PhD, MHS, a researcher in the department of epidemiology at Johns Hopkins University, Baltimore, and colleagues analyzed data from the ongoing Atherosclerosis Risk in Communities (ARIC) study.

ARIC initially enrolled more than 15,000 adults in Maryland, Minnesota, Mississippi, and North Carolina between 1987 and 1989. In the present study, the researchers focused on data from 2,956 participants who attended a study visit between 2016 and 2017, during which researchers assessed their hearing using pure tone audiometry.

Hearing-study participants had an average age of 79 years, about 58% were women, and 80% were White. Approximately 33% of the participants had normal hearing, 40% had mild hearing impairment, 23% had moderate hearing impairment, and 4% had severe hearing impairment.

Participants had also undergone assessment of physical functioning at study visits between 2011 and 2019, including a fast-paced 2-minute walk test to measure their walking endurance. Another assessment, the Short Physical Performance Battery (SPPB), tests balance, gait speed, and chair stands (seated participants stand up and sit back down five times as quickly as possible while their arms are crossed).

Dr. Martinez-Amezcua and colleagues found that severe hearing impairment was associated with a lower average SPPB score compared with normal hearing in a regression analysis. Specifically, compared with those with normal hearing, participants with severe hearing impairment were more likely to have low scores on the SPPB (odds ratio, 2.72), balance (OR, 2.72), and gait speed (OR, 2.16).

However, hearing impairment was not significantly associated with the chair stand test results. The researchers note that chair stands may rely more on strength, whereas balance and gait speed may rely more on coordination and movement.

The team also found that people with worse hearing tended to walk a shorter distance during the 2-minute walk test. Compared with participants with normal hearing, participants with moderate hearing impairment walked 2.81 meters less and those with severe hearing impairment walked 5.31 meters less on average, after adjustment for variables including age, sex, and health conditions.

Participants with hearing impairment also tended to have faster declines in physical function over time.

Various mechanisms could explain associations between hearing and physical function, the authors said. For example, an underlying condition such as cardiovascular disease might affect both hearing and physical function. Damage to the inner ear could affect vestibular and auditory systems at the same time. In addition, hearing impairment may relate to cognition, depression, or social isolation, which could influence physical activity.

“Age-related hearing loss is traditionally seen as a barrier for communication,” Dr. Martinez-Amezcua told this news organization. “In the past decade, research on the consequences of hearing loss has identified it as a risk factor for cognitive decline and dementia. Our findings contribute to our understanding of other negative outcomes associated with hearing loss.”

Randomized clinical trials are the best way to assess whether addressing hearing loss might improve physical function, Dr. Martinez-Amezcua said. “Currently there is one clinical trial (ACHIEVE) that will, among other outcomes, study the impact of hearing aids on cognitive and physical function,” he said.

Although interventions may not reverse hearing loss, hearing rehabilitation strategies, including hearing aids and cochlear implants, may help, he added. Educating caregivers and changing a person’s environment can also reduce the effects hearing loss has on daily life, Dr. Martinez-Amezcua said.

“We rely so much in our sense of vision for activities of daily living that we tend to underestimate how important hearing is, and the consequences of hearing loss go beyond having trouble communicating with someone,” he said.

This study and prior research “raise the intriguing idea that hearing may provide essential information to the neural circuits underpinning movement in our environment and that correction for hearing loss may help promote physical well-being,” Willa D. Brenowitz, PhD, MPH, and Margaret I. Wallhagen, PhD, GNP-BC, both at the University of California, San Francisco, wrote in an accompanying commentary. “While this hypothesis is appealing and warrants further investigation, there are multiple other potential explanations of such an association, including potential sources of bias that may affect observational studies such as this one.”

Beyond treating hearing loss, interventions such as physical therapy or tai chi may benefit patients, they suggested.

Because many changes occur during older age, it can be difficult to understand which factor is influencing another, Dr. Brenowitz said in an interview. There are potentially relevant mechanisms through which hearing could affect cognition and physical functioning. Still another explanation could be that some people are “aging in a faster way” than others, Dr. Brenowitz said.

Dr. Martinez-Amezcua and a coauthor disclosed receiving sponsorship from the Cochlear Center for Hearing and Public Health. Another author, Frank R. Lin, MD, PhD, directs the research center, which is partly funded by a philanthropic gift from Cochlear to the Johns Hopkins Bloomberg School of Public Health. Dr. Lin also disclosed personal fees from Frequency Therapeutics and Caption Call. One author serves on a scientific advisory board for Shoebox and Good Machine Studio.

Dr. Wallhagen has served on the board of trustees of the Hearing Loss Association of America and is a member of the board of the Hearing Loss Association of America–California. Dr. Wallhagen also received funding for a pilot project on the impact of hearing loss on communication in the context of chronic serious illness from the National Palliative Care Research Center outside the submitted work.

A version of this article first appeared on Medscape.com.

Older adults with hearing impairment tend to have poorer physical function, less walking endurance, and faster declines in physical function compared with older adults with normal hearing, according to a study published online in JAMA Network Open.

Hearing loss is associated with slower gait and, in particular, worse balance, the data suggest.

“Because hearing impairment is amenable to prevention and management, it potentially serves as a target for interventions to slow physical decline with aging,” the researchers said.

To examine how hearing impairment relates to physical function in older adults, Pablo Martinez-Amezcua, MD, PhD, MHS, a researcher in the department of epidemiology at Johns Hopkins University, Baltimore, and colleagues analyzed data from the ongoing Atherosclerosis Risk in Communities (ARIC) study.

ARIC initially enrolled more than 15,000 adults in Maryland, Minnesota, Mississippi, and North Carolina between 1987 and 1989. In the present study, the researchers focused on data from 2,956 participants who attended a study visit between 2016 and 2017, during which researchers assessed their hearing using pure tone audiometry.

Hearing-study participants had an average age of 79 years, about 58% were women, and 80% were White. Approximately 33% of the participants had normal hearing, 40% had mild hearing impairment, 23% had moderate hearing impairment, and 4% had severe hearing impairment.

Participants had also undergone assessment of physical functioning at study visits between 2011 and 2019, including a fast-paced 2-minute walk test to measure their walking endurance. Another assessment, the Short Physical Performance Battery (SPPB), tests balance, gait speed, and chair stands (seated participants stand up and sit back down five times as quickly as possible while their arms are crossed).

Dr. Martinez-Amezcua and colleagues found that severe hearing impairment was associated with a lower average SPPB score compared with normal hearing in a regression analysis. Specifically, compared with those with normal hearing, participants with severe hearing impairment were more likely to have low scores on the SPPB (odds ratio, 2.72), balance (OR, 2.72), and gait speed (OR, 2.16).

However, hearing impairment was not significantly associated with the chair stand test results. The researchers note that chair stands may rely more on strength, whereas balance and gait speed may rely more on coordination and movement.

The team also found that people with worse hearing tended to walk a shorter distance during the 2-minute walk test. Compared with participants with normal hearing, participants with moderate hearing impairment walked 2.81 meters less and those with severe hearing impairment walked 5.31 meters less on average, after adjustment for variables including age, sex, and health conditions.

Participants with hearing impairment also tended to have faster declines in physical function over time.

Various mechanisms could explain associations between hearing and physical function, the authors said. For example, an underlying condition such as cardiovascular disease might affect both hearing and physical function. Damage to the inner ear could affect vestibular and auditory systems at the same time. In addition, hearing impairment may relate to cognition, depression, or social isolation, which could influence physical activity.

“Age-related hearing loss is traditionally seen as a barrier for communication,” Dr. Martinez-Amezcua told this news organization. “In the past decade, research on the consequences of hearing loss has identified it as a risk factor for cognitive decline and dementia. Our findings contribute to our understanding of other negative outcomes associated with hearing loss.”

Randomized clinical trials are the best way to assess whether addressing hearing loss might improve physical function, Dr. Martinez-Amezcua said. “Currently there is one clinical trial (ACHIEVE) that will, among other outcomes, study the impact of hearing aids on cognitive and physical function,” he said.

Although interventions may not reverse hearing loss, hearing rehabilitation strategies, including hearing aids and cochlear implants, may help, he added. Educating caregivers and changing a person’s environment can also reduce the effects hearing loss has on daily life, Dr. Martinez-Amezcua said.

“We rely so much in our sense of vision for activities of daily living that we tend to underestimate how important hearing is, and the consequences of hearing loss go beyond having trouble communicating with someone,” he said.

This study and prior research “raise the intriguing idea that hearing may provide essential information to the neural circuits underpinning movement in our environment and that correction for hearing loss may help promote physical well-being,” Willa D. Brenowitz, PhD, MPH, and Margaret I. Wallhagen, PhD, GNP-BC, both at the University of California, San Francisco, wrote in an accompanying commentary. “While this hypothesis is appealing and warrants further investigation, there are multiple other potential explanations of such an association, including potential sources of bias that may affect observational studies such as this one.”

Beyond treating hearing loss, interventions such as physical therapy or tai chi may benefit patients, they suggested.

Because many changes occur during older age, it can be difficult to understand which factor is influencing another, Dr. Brenowitz said in an interview. There are potentially relevant mechanisms through which hearing could affect cognition and physical functioning. Still another explanation could be that some people are “aging in a faster way” than others, Dr. Brenowitz said.

Dr. Martinez-Amezcua and a coauthor disclosed receiving sponsorship from the Cochlear Center for Hearing and Public Health. Another author, Frank R. Lin, MD, PhD, directs the research center, which is partly funded by a philanthropic gift from Cochlear to the Johns Hopkins Bloomberg School of Public Health. Dr. Lin also disclosed personal fees from Frequency Therapeutics and Caption Call. One author serves on a scientific advisory board for Shoebox and Good Machine Studio.

Dr. Wallhagen has served on the board of trustees of the Hearing Loss Association of America and is a member of the board of the Hearing Loss Association of America–California. Dr. Wallhagen also received funding for a pilot project on the impact of hearing loss on communication in the context of chronic serious illness from the National Palliative Care Research Center outside the submitted work.

A version of this article first appeared on Medscape.com.

Older adults with hearing impairment tend to have poorer physical function, less walking endurance, and faster declines in physical function compared with older adults with normal hearing, according to a study published online in JAMA Network Open.

Hearing loss is associated with slower gait and, in particular, worse balance, the data suggest.

“Because hearing impairment is amenable to prevention and management, it potentially serves as a target for interventions to slow physical decline with aging,” the researchers said.

To examine how hearing impairment relates to physical function in older adults, Pablo Martinez-Amezcua, MD, PhD, MHS, a researcher in the department of epidemiology at Johns Hopkins University, Baltimore, and colleagues analyzed data from the ongoing Atherosclerosis Risk in Communities (ARIC) study.

ARIC initially enrolled more than 15,000 adults in Maryland, Minnesota, Mississippi, and North Carolina between 1987 and 1989. In the present study, the researchers focused on data from 2,956 participants who attended a study visit between 2016 and 2017, during which researchers assessed their hearing using pure tone audiometry.

Hearing-study participants had an average age of 79 years, about 58% were women, and 80% were White. Approximately 33% of the participants had normal hearing, 40% had mild hearing impairment, 23% had moderate hearing impairment, and 4% had severe hearing impairment.

Participants had also undergone assessment of physical functioning at study visits between 2011 and 2019, including a fast-paced 2-minute walk test to measure their walking endurance. Another assessment, the Short Physical Performance Battery (SPPB), tests balance, gait speed, and chair stands (seated participants stand up and sit back down five times as quickly as possible while their arms are crossed).

Dr. Martinez-Amezcua and colleagues found that severe hearing impairment was associated with a lower average SPPB score compared with normal hearing in a regression analysis. Specifically, compared with those with normal hearing, participants with severe hearing impairment were more likely to have low scores on the SPPB (odds ratio, 2.72), balance (OR, 2.72), and gait speed (OR, 2.16).

However, hearing impairment was not significantly associated with the chair stand test results. The researchers note that chair stands may rely more on strength, whereas balance and gait speed may rely more on coordination and movement.

The team also found that people with worse hearing tended to walk a shorter distance during the 2-minute walk test. Compared with participants with normal hearing, participants with moderate hearing impairment walked 2.81 meters less and those with severe hearing impairment walked 5.31 meters less on average, after adjustment for variables including age, sex, and health conditions.

Participants with hearing impairment also tended to have faster declines in physical function over time.

Various mechanisms could explain associations between hearing and physical function, the authors said. For example, an underlying condition such as cardiovascular disease might affect both hearing and physical function. Damage to the inner ear could affect vestibular and auditory systems at the same time. In addition, hearing impairment may relate to cognition, depression, or social isolation, which could influence physical activity.

“Age-related hearing loss is traditionally seen as a barrier for communication,” Dr. Martinez-Amezcua told this news organization. “In the past decade, research on the consequences of hearing loss has identified it as a risk factor for cognitive decline and dementia. Our findings contribute to our understanding of other negative outcomes associated with hearing loss.”

Randomized clinical trials are the best way to assess whether addressing hearing loss might improve physical function, Dr. Martinez-Amezcua said. “Currently there is one clinical trial (ACHIEVE) that will, among other outcomes, study the impact of hearing aids on cognitive and physical function,” he said.

Although interventions may not reverse hearing loss, hearing rehabilitation strategies, including hearing aids and cochlear implants, may help, he added. Educating caregivers and changing a person’s environment can also reduce the effects hearing loss has on daily life, Dr. Martinez-Amezcua said.

“We rely so much in our sense of vision for activities of daily living that we tend to underestimate how important hearing is, and the consequences of hearing loss go beyond having trouble communicating with someone,” he said.

This study and prior research “raise the intriguing idea that hearing may provide essential information to the neural circuits underpinning movement in our environment and that correction for hearing loss may help promote physical well-being,” Willa D. Brenowitz, PhD, MPH, and Margaret I. Wallhagen, PhD, GNP-BC, both at the University of California, San Francisco, wrote in an accompanying commentary. “While this hypothesis is appealing and warrants further investigation, there are multiple other potential explanations of such an association, including potential sources of bias that may affect observational studies such as this one.”

Beyond treating hearing loss, interventions such as physical therapy or tai chi may benefit patients, they suggested.

Because many changes occur during older age, it can be difficult to understand which factor is influencing another, Dr. Brenowitz said in an interview. There are potentially relevant mechanisms through which hearing could affect cognition and physical functioning. Still another explanation could be that some people are “aging in a faster way” than others, Dr. Brenowitz said.

Dr. Martinez-Amezcua and a coauthor disclosed receiving sponsorship from the Cochlear Center for Hearing and Public Health. Another author, Frank R. Lin, MD, PhD, directs the research center, which is partly funded by a philanthropic gift from Cochlear to the Johns Hopkins Bloomberg School of Public Health. Dr. Lin also disclosed personal fees from Frequency Therapeutics and Caption Call. One author serves on a scientific advisory board for Shoebox and Good Machine Studio.

Dr. Wallhagen has served on the board of trustees of the Hearing Loss Association of America and is a member of the board of the Hearing Loss Association of America–California. Dr. Wallhagen also received funding for a pilot project on the impact of hearing loss on communication in the context of chronic serious illness from the National Palliative Care Research Center outside the submitted work.

A version of this article first appeared on Medscape.com.

Tardive dyskinesia (TD) can be reasonably managed through telemedicine, but it should be employed as part of a hybrid strategy that ideally includes an office visit at the time of diagnosis and yearly intervals thereafter, according to an expert who spoke at a meeting presented by Current Psychiatry and the American Academy of Clinical Psychiatrists.

verbaska_studio/Getty Images

In psychiatry in general and in TD specifically, telepsychiatry is useful, but “is not a one-size-fits-all approach,” according to Rif S. El-Mallakh, MD, director of the mood disorder research program at the University of Louisville (Ky.).

Telepsychiatry was already growing as a strategy to expand psychiatric services to communities with limited resources in mental health when the COVID-19 pandemic arrived. Dependence on this type of patient care then exploded out of necessity but in advance of how it might best be applied in specific circumstances.
 

Best practices panel convened in 2020

The project to develop best practices in TD began in July 2020, when the pandemic was still limiting normal clinician-patient interactions. It was expected from the beginning that recommendations would be applicable to postpandemic circumstances.

There is no reason to expect the forces driving the growth of telepsychiatry, which include convenience of patients and efficiency for clinicians, to dissipate once the pandemic resolves, Dr. El-Mallakh said at the virtual meeting, sponsored by MedscapeLive.

The process of developing best practices for telepsychiatry in TD began with semistructured qualitative interviews of the panelists, which consisted of six neurologists, three psychiatrists, and three psychiatric nurse practitioners. The goal was to gather information about the current practice of TD diagnosis and treatment in real-world settings.

With the information on current practices providing a baseline, a virtual roundtable was then convened to develop best-practices recommendations. The deliberations were performed on the basis of expert opinion. There were no statistical methods applied to data collected from the qualitative interviews.
 

Four key points in recommendations

The panel agreed on four key points: an in-person visit is preferred for initial evaluation and diagnosis; when applied for the evaluation of TD, telepsychiatry should include video; virtual visits cannot completely replace in-person visits; and patients with TD should be evaluated in person at least once per year.

In addition, the panelists recommended specific steps aimed at maximizing the quality of the virtual visit, including confirming that patients have appropriate equipment for video and audio communication. It is also important to recognize that patients or caregivers may require instruction on how to set up the equipment.

Prior to a telemedicine visit, it is appropriate to provide patients with a checklist that includes instructions on adequate lighting and audio. In addition, patient expectations about the goals and processes in the video should be explained.

“Instructional videos prior to the visit might be helpful,” Dr. El-Mallakh said.

Immediately prior to each visit, visual and audio quality should be verified. This allows technical issues, if any, to be resolved.

For the evaluation of TD, the ability to adequately observe body movements is crucial but can pose a challenge in telepsychiatry. To capture hyperkinetic movements and functional impairments with adequate clarity, it might be necessary to engage caregivers to hold the camera or otherwise help the clinician gain an adequate view. Clinicians should consider the limitations of telepsychiatry.

In addition to the challenges of a differential diagnosis for TD that should include such entities as parkinsonism and other drug-induced movement disorders, Dr. El-Mallakh cautioned, “comorbidities add another layer of complexity to TD diagnosis.”
 

Some in-office visits recommended

It is this complexity that led to the recommendation for an in-person evaluation for new-onset TD, although the expert panel did not characterize an initial in-office visit as mandatory.

Once a diagnosis of TD is established, telepsychiatry can be an efficient strategy for education and for confirming that treatments remain effective. However, Dr. El-Mallakh pointed out that patients can and often do have more than one drug-induced movement disorder at the time of diagnosis or develop additional clinical issues over time.

According to the expert panel, telepsychiatry should not be considered an adequate strategy to manage TD by itself, but “it can be an important component” of care of these patients if used judiciously.

“We have all come to recognize the benefits of telepsychiatry and some of the limitations,” said Jonathan M. Meyer, MD, clinical professor of psychiatry, University of California, San Diego. An author or coauthor of several articles on TD, including a recent study of patient awareness of TD symptoms while on vesicular monoamine transporter 2 inhibitors, Dr. Meyer identified technical problems as among the limitations.

Doug Brunk/MDedge News

Tardive dyskinesia (TD) can be reasonably managed through telemedicine, but it should be employed as part of a hybrid strategy that ideally includes an office visit at the time of diagnosis and yearly intervals thereafter, according to an expert who spoke at a meeting presented by Current Psychiatry and the American Academy of Clinical Psychiatrists.

verbaska_studio/Getty Images

In psychiatry in general and in TD specifically, telepsychiatry is useful, but “is not a one-size-fits-all approach,” according to Rif S. El-Mallakh, MD, director of the mood disorder research program at the University of Louisville (Ky.).

Telepsychiatry was already growing as a strategy to expand psychiatric services to communities with limited resources in mental health when the COVID-19 pandemic arrived. Dependence on this type of patient care then exploded out of necessity but in advance of how it might best be applied in specific circumstances.
 

Best practices panel convened in 2020

The project to develop best practices in TD began in July 2020, when the pandemic was still limiting normal clinician-patient interactions. It was expected from the beginning that recommendations would be applicable to postpandemic circumstances.

There is no reason to expect the forces driving the growth of telepsychiatry, which include convenience of patients and efficiency for clinicians, to dissipate once the pandemic resolves, Dr. El-Mallakh said at the virtual meeting, sponsored by MedscapeLive.

The process of developing best practices for telepsychiatry in TD began with semistructured qualitative interviews of the panelists, which consisted of six neurologists, three psychiatrists, and three psychiatric nurse practitioners. The goal was to gather information about the current practice of TD diagnosis and treatment in real-world settings.

With the information on current practices providing a baseline, a virtual roundtable was then convened to develop best-practices recommendations. The deliberations were performed on the basis of expert opinion. There were no statistical methods applied to data collected from the qualitative interviews.
 

Four key points in recommendations

The panel agreed on four key points: an in-person visit is preferred for initial evaluation and diagnosis; when applied for the evaluation of TD, telepsychiatry should include video; virtual visits cannot completely replace in-person visits; and patients with TD should be evaluated in person at least once per year.

In addition, the panelists recommended specific steps aimed at maximizing the quality of the virtual visit, including confirming that patients have appropriate equipment for video and audio communication. It is also important to recognize that patients or caregivers may require instruction on how to set up the equipment.

Prior to a telemedicine visit, it is appropriate to provide patients with a checklist that includes instructions on adequate lighting and audio. In addition, patient expectations about the goals and processes in the video should be explained.

“Instructional videos prior to the visit might be helpful,” Dr. El-Mallakh said.

Immediately prior to each visit, visual and audio quality should be verified. This allows technical issues, if any, to be resolved.

For the evaluation of TD, the ability to adequately observe body movements is crucial but can pose a challenge in telepsychiatry. To capture hyperkinetic movements and functional impairments with adequate clarity, it might be necessary to engage caregivers to hold the camera or otherwise help the clinician gain an adequate view. Clinicians should consider the limitations of telepsychiatry.

In addition to the challenges of a differential diagnosis for TD that should include such entities as parkinsonism and other drug-induced movement disorders, Dr. El-Mallakh cautioned, “comorbidities add another layer of complexity to TD diagnosis.”
 

Some in-office visits recommended

It is this complexity that led to the recommendation for an in-person evaluation for new-onset TD, although the expert panel did not characterize an initial in-office visit as mandatory.

Once a diagnosis of TD is established, telepsychiatry can be an efficient strategy for education and for confirming that treatments remain effective. However, Dr. El-Mallakh pointed out that patients can and often do have more than one drug-induced movement disorder at the time of diagnosis or develop additional clinical issues over time.

According to the expert panel, telepsychiatry should not be considered an adequate strategy to manage TD by itself, but “it can be an important component” of care of these patients if used judiciously.

“We have all come to recognize the benefits of telepsychiatry and some of the limitations,” said Jonathan M. Meyer, MD, clinical professor of psychiatry, University of California, San Diego. An author or coauthor of several articles on TD, including a recent study of patient awareness of TD symptoms while on vesicular monoamine transporter 2 inhibitors, Dr. Meyer identified technical problems as among the limitations.

Doug Brunk/MDedge News

Tardive dyskinesia (TD) can be reasonably managed through telemedicine, but it should be employed as part of a hybrid strategy that ideally includes an office visit at the time of diagnosis and yearly intervals thereafter, according to an expert who spoke at a meeting presented by Current Psychiatry and the American Academy of Clinical Psychiatrists.

verbaska_studio/Getty Images

In psychiatry in general and in TD specifically, telepsychiatry is useful, but “is not a one-size-fits-all approach,” according to Rif S. El-Mallakh, MD, director of the mood disorder research program at the University of Louisville (Ky.).

Telepsychiatry was already growing as a strategy to expand psychiatric services to communities with limited resources in mental health when the COVID-19 pandemic arrived. Dependence on this type of patient care then exploded out of necessity but in advance of how it might best be applied in specific circumstances.
 

Best practices panel convened in 2020

The project to develop best practices in TD began in July 2020, when the pandemic was still limiting normal clinician-patient interactions. It was expected from the beginning that recommendations would be applicable to postpandemic circumstances.

There is no reason to expect the forces driving the growth of telepsychiatry, which include convenience of patients and efficiency for clinicians, to dissipate once the pandemic resolves, Dr. El-Mallakh said at the virtual meeting, sponsored by MedscapeLive.

The process of developing best practices for telepsychiatry in TD began with semistructured qualitative interviews of the panelists, which consisted of six neurologists, three psychiatrists, and three psychiatric nurse practitioners. The goal was to gather information about the current practice of TD diagnosis and treatment in real-world settings.

With the information on current practices providing a baseline, a virtual roundtable was then convened to develop best-practices recommendations. The deliberations were performed on the basis of expert opinion. There were no statistical methods applied to data collected from the qualitative interviews.
 

Four key points in recommendations

The panel agreed on four key points: an in-person visit is preferred for initial evaluation and diagnosis; when applied for the evaluation of TD, telepsychiatry should include video; virtual visits cannot completely replace in-person visits; and patients with TD should be evaluated in person at least once per year.

In addition, the panelists recommended specific steps aimed at maximizing the quality of the virtual visit, including confirming that patients have appropriate equipment for video and audio communication. It is also important to recognize that patients or caregivers may require instruction on how to set up the equipment.

Prior to a telemedicine visit, it is appropriate to provide patients with a checklist that includes instructions on adequate lighting and audio. In addition, patient expectations about the goals and processes in the video should be explained.

“Instructional videos prior to the visit might be helpful,” Dr. El-Mallakh said.

Immediately prior to each visit, visual and audio quality should be verified. This allows technical issues, if any, to be resolved.

For the evaluation of TD, the ability to adequately observe body movements is crucial but can pose a challenge in telepsychiatry. To capture hyperkinetic movements and functional impairments with adequate clarity, it might be necessary to engage caregivers to hold the camera or otherwise help the clinician gain an adequate view. Clinicians should consider the limitations of telepsychiatry.

In addition to the challenges of a differential diagnosis for TD that should include such entities as parkinsonism and other drug-induced movement disorders, Dr. El-Mallakh cautioned, “comorbidities add another layer of complexity to TD diagnosis.”
 

Some in-office visits recommended

It is this complexity that led to the recommendation for an in-person evaluation for new-onset TD, although the expert panel did not characterize an initial in-office visit as mandatory.

Once a diagnosis of TD is established, telepsychiatry can be an efficient strategy for education and for confirming that treatments remain effective. However, Dr. El-Mallakh pointed out that patients can and often do have more than one drug-induced movement disorder at the time of diagnosis or develop additional clinical issues over time.

According to the expert panel, telepsychiatry should not be considered an adequate strategy to manage TD by itself, but “it can be an important component” of care of these patients if used judiciously.

“We have all come to recognize the benefits of telepsychiatry and some of the limitations,” said Jonathan M. Meyer, MD, clinical professor of psychiatry, University of California, San Diego. An author or coauthor of several articles on TD, including a recent study of patient awareness of TD symptoms while on vesicular monoamine transporter 2 inhibitors, Dr. Meyer identified technical problems as among the limitations.

Doug Brunk/MDedge News

Excessive drooling by patients with advanced Parkinson’s disease is an indicator of greater motor and nonmotor dysfunction, new research shows. “Sialorrhea is not just a cosmetic problem,” study investigator Francesca Morgante, MD, associate professor of neurology, St. George’s University, London, told this news organization.

“We need to understand the relationship between sialorrhea and these speech and swallowing disturbances and whether treatment for sialorrhea improves that,” Dr. Morgante added.

The findings were presented at the 2021 Congress of the European Academy of Neurology.
 

Underrecognized symptom

Sialorrhea is an underrecognized nonmotor symptom that can affect up to 70% of patients with Parkinson’s disease, said co-investigator Ioana Cociasu, PhD, postdoctoral research fellow, Neurosciences Research Center, St. George’s University. The impact on quality of life increases with disease severity, she said.

The current study included 101 consecutive patients attending an advanced Parkinson’s disease disorders clinic. Researchers collected demographic data that included information on gender, age, age at Parkinson’s disease onset, and disease duration. They also gathered data on motor symptoms by assessing total levodopa equivalent daily dose (LEDD) and LEDD dopamine agonists. They also assessed results on the Unified Parkinson’s Disease Rating Scale (UPDRS) part III and the Hoehn and Yahr scale for on- and off-medication states.

Nonmotor functioning was assessed using the Non-Motor Symptoms Scale (NMSS) and Scales for Outcomes in Parkinson’s disease–autonomic dysfunction (SCOPA-AUT) questionnaire. Among patients with Parkinson’s disease, autonomic dysfunction can precede motor impairment and can involve orthostatic and postprandial hypotension, among other symptoms, the investigators noted.

Health status and quality of life were assessed using the Parkinson’s disease questionnaire–39 items (PDQ-39). The Radboud Oral Motor Inventory for PD (ROMP) was used to measure orofacial symptoms. ROMP is a self-administered questionnaire that evaluates speech, swallowing disturbances, and drooling of saliva. The Montreal Cognitive Assessment test was also used.

Investigators compared participants with sialorrhea to those without sialorrhea, described as droolers and nondroolers. Droolers were defined as those scoring higher than 1 on the UPDRS-II item 6. This signified slight but definite presence of saliva in the mouth and/or the possibility of nighttime drooling.
 

Greater impairment

Among the participants, 65 (64.4%) were classified as droolers, and 36 (35.6%) as nondroolers.

Patients with both Parkinson’s disease and sialorrhea were significantly more impaired in terms of motor functioning than those without sialorrhea. In these patients, the UPDRS-III was more severe in both the off- (P = .03) and on-states (P = .002), and they had less improvement with the levodopa challenge test (P = .007).

Droolers were also more severely affected by nonmotor problems. They had more severe speech dysfunction (P < .0001) and swallowing dysfunction (P < .05), and they had higher scores on the NMSS (P = .0008) and SCOPA-AUT (P = .003) and poorer quality-of-life scores on the PDQ-39 (P = .049).

To evaluate respiratory tract infections, the researchers used electronic health records. About 15.4% of the study population had had a documented respiratory infection since they were diagnosed with Parkinson’s disease.

Upper and lower respiratory tract infections were more frequent among droolers than nondroolers (P = .05).

“Infections might arise from swallowing disturbances leading to aspiration and drooling,” Dr. Morgante noted.

The drooling did not appear to affect cognition or sleep in these patients.
 

Treatment options?

Following the study presentation, session co-chair Philippe G. Damier, MD, PhD, professor of neurology, University Hospital, Nantes, France, asked about the best treatment for sialorrhea for these patients.

In general, those with milder disease might try chewing gum to improve swallowing; patients with more severe cases may benefit from botulinum toxin injections, said Dr. Cociasu. The treatment choice, she added, “very much depends on the severity of the sialorrhea.”

Botulinum toxin therapy involves injections into the salivary gland to reduce saliva production. It is typically administered about every 4 months.

The second session co-chair, Elena Moro, MD, PhD, director of the Movement Disorders Unit at Grenoble Alpes University, France, pointed out that chewing gum may be a swallowing hazard for patients with PD and severe dementia.

Asked by Dr. Moro whether patients with higher scores on balance and posture were more likely to have sialorrhea, Dr. Cociasu said she and her colleagues are currently looking into this.

Dr. Morgante said that the current study did not examine the effect of treatment on speech disorders associated with sialorrhea. “We are running another study now to understand the effect of treatment of sialorrhea on these features,” she said.

Dr. Morgante and Dr. Cociasu have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Excessive drooling by patients with advanced Parkinson’s disease is an indicator of greater motor and nonmotor dysfunction, new research shows. “Sialorrhea is not just a cosmetic problem,” study investigator Francesca Morgante, MD, associate professor of neurology, St. George’s University, London, told this news organization.

“We need to understand the relationship between sialorrhea and these speech and swallowing disturbances and whether treatment for sialorrhea improves that,” Dr. Morgante added.

The findings were presented at the 2021 Congress of the European Academy of Neurology.
 

Underrecognized symptom

Sialorrhea is an underrecognized nonmotor symptom that can affect up to 70% of patients with Parkinson’s disease, said co-investigator Ioana Cociasu, PhD, postdoctoral research fellow, Neurosciences Research Center, St. George’s University. The impact on quality of life increases with disease severity, she said.

The current study included 101 consecutive patients attending an advanced Parkinson’s disease disorders clinic. Researchers collected demographic data that included information on gender, age, age at Parkinson’s disease onset, and disease duration. They also gathered data on motor symptoms by assessing total levodopa equivalent daily dose (LEDD) and LEDD dopamine agonists. They also assessed results on the Unified Parkinson’s Disease Rating Scale (UPDRS) part III and the Hoehn and Yahr scale for on- and off-medication states.

Nonmotor functioning was assessed using the Non-Motor Symptoms Scale (NMSS) and Scales for Outcomes in Parkinson’s disease–autonomic dysfunction (SCOPA-AUT) questionnaire. Among patients with Parkinson’s disease, autonomic dysfunction can precede motor impairment and can involve orthostatic and postprandial hypotension, among other symptoms, the investigators noted.

Health status and quality of life were assessed using the Parkinson’s disease questionnaire–39 items (PDQ-39). The Radboud Oral Motor Inventory for PD (ROMP) was used to measure orofacial symptoms. ROMP is a self-administered questionnaire that evaluates speech, swallowing disturbances, and drooling of saliva. The Montreal Cognitive Assessment test was also used.

Investigators compared participants with sialorrhea to those without sialorrhea, described as droolers and nondroolers. Droolers were defined as those scoring higher than 1 on the UPDRS-II item 6. This signified slight but definite presence of saliva in the mouth and/or the possibility of nighttime drooling.
 

Greater impairment

Among the participants, 65 (64.4%) were classified as droolers, and 36 (35.6%) as nondroolers.

Patients with both Parkinson’s disease and sialorrhea were significantly more impaired in terms of motor functioning than those without sialorrhea. In these patients, the UPDRS-III was more severe in both the off- (P = .03) and on-states (P = .002), and they had less improvement with the levodopa challenge test (P = .007).

Droolers were also more severely affected by nonmotor problems. They had more severe speech dysfunction (P < .0001) and swallowing dysfunction (P < .05), and they had higher scores on the NMSS (P = .0008) and SCOPA-AUT (P = .003) and poorer quality-of-life scores on the PDQ-39 (P = .049).

To evaluate respiratory tract infections, the researchers used electronic health records. About 15.4% of the study population had had a documented respiratory infection since they were diagnosed with Parkinson’s disease.

Upper and lower respiratory tract infections were more frequent among droolers than nondroolers (P = .05).

“Infections might arise from swallowing disturbances leading to aspiration and drooling,” Dr. Morgante noted.

The drooling did not appear to affect cognition or sleep in these patients.
 

Treatment options?

Following the study presentation, session co-chair Philippe G. Damier, MD, PhD, professor of neurology, University Hospital, Nantes, France, asked about the best treatment for sialorrhea for these patients.

In general, those with milder disease might try chewing gum to improve swallowing; patients with more severe cases may benefit from botulinum toxin injections, said Dr. Cociasu. The treatment choice, she added, “very much depends on the severity of the sialorrhea.”

Botulinum toxin therapy involves injections into the salivary gland to reduce saliva production. It is typically administered about every 4 months.

The second session co-chair, Elena Moro, MD, PhD, director of the Movement Disorders Unit at Grenoble Alpes University, France, pointed out that chewing gum may be a swallowing hazard for patients with PD and severe dementia.

Asked by Dr. Moro whether patients with higher scores on balance and posture were more likely to have sialorrhea, Dr. Cociasu said she and her colleagues are currently looking into this.

Dr. Morgante said that the current study did not examine the effect of treatment on speech disorders associated with sialorrhea. “We are running another study now to understand the effect of treatment of sialorrhea on these features,” she said.

Dr. Morgante and Dr. Cociasu have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Excessive drooling by patients with advanced Parkinson’s disease is an indicator of greater motor and nonmotor dysfunction, new research shows. “Sialorrhea is not just a cosmetic problem,” study investigator Francesca Morgante, MD, associate professor of neurology, St. George’s University, London, told this news organization.

“We need to understand the relationship between sialorrhea and these speech and swallowing disturbances and whether treatment for sialorrhea improves that,” Dr. Morgante added.

The findings were presented at the 2021 Congress of the European Academy of Neurology.
 

Underrecognized symptom

Sialorrhea is an underrecognized nonmotor symptom that can affect up to 70% of patients with Parkinson’s disease, said co-investigator Ioana Cociasu, PhD, postdoctoral research fellow, Neurosciences Research Center, St. George’s University. The impact on quality of life increases with disease severity, she said.

The current study included 101 consecutive patients attending an advanced Parkinson’s disease disorders clinic. Researchers collected demographic data that included information on gender, age, age at Parkinson’s disease onset, and disease duration. They also gathered data on motor symptoms by assessing total levodopa equivalent daily dose (LEDD) and LEDD dopamine agonists. They also assessed results on the Unified Parkinson’s Disease Rating Scale (UPDRS) part III and the Hoehn and Yahr scale for on- and off-medication states.

Nonmotor functioning was assessed using the Non-Motor Symptoms Scale (NMSS) and Scales for Outcomes in Parkinson’s disease–autonomic dysfunction (SCOPA-AUT) questionnaire. Among patients with Parkinson’s disease, autonomic dysfunction can precede motor impairment and can involve orthostatic and postprandial hypotension, among other symptoms, the investigators noted.

Health status and quality of life were assessed using the Parkinson’s disease questionnaire–39 items (PDQ-39). The Radboud Oral Motor Inventory for PD (ROMP) was used to measure orofacial symptoms. ROMP is a self-administered questionnaire that evaluates speech, swallowing disturbances, and drooling of saliva. The Montreal Cognitive Assessment test was also used.

Investigators compared participants with sialorrhea to those without sialorrhea, described as droolers and nondroolers. Droolers were defined as those scoring higher than 1 on the UPDRS-II item 6. This signified slight but definite presence of saliva in the mouth and/or the possibility of nighttime drooling.
 

Greater impairment

Among the participants, 65 (64.4%) were classified as droolers, and 36 (35.6%) as nondroolers.

Patients with both Parkinson’s disease and sialorrhea were significantly more impaired in terms of motor functioning than those without sialorrhea. In these patients, the UPDRS-III was more severe in both the off- (P = .03) and on-states (P = .002), and they had less improvement with the levodopa challenge test (P = .007).

Droolers were also more severely affected by nonmotor problems. They had more severe speech dysfunction (P < .0001) and swallowing dysfunction (P < .05), and they had higher scores on the NMSS (P = .0008) and SCOPA-AUT (P = .003) and poorer quality-of-life scores on the PDQ-39 (P = .049).

To evaluate respiratory tract infections, the researchers used electronic health records. About 15.4% of the study population had had a documented respiratory infection since they were diagnosed with Parkinson’s disease.

Upper and lower respiratory tract infections were more frequent among droolers than nondroolers (P = .05).

“Infections might arise from swallowing disturbances leading to aspiration and drooling,” Dr. Morgante noted.

The drooling did not appear to affect cognition or sleep in these patients.
 

Treatment options?

Following the study presentation, session co-chair Philippe G. Damier, MD, PhD, professor of neurology, University Hospital, Nantes, France, asked about the best treatment for sialorrhea for these patients.

In general, those with milder disease might try chewing gum to improve swallowing; patients with more severe cases may benefit from botulinum toxin injections, said Dr. Cociasu. The treatment choice, she added, “very much depends on the severity of the sialorrhea.”

Botulinum toxin therapy involves injections into the salivary gland to reduce saliva production. It is typically administered about every 4 months.

The second session co-chair, Elena Moro, MD, PhD, director of the Movement Disorders Unit at Grenoble Alpes University, France, pointed out that chewing gum may be a swallowing hazard for patients with PD and severe dementia.

Asked by Dr. Moro whether patients with higher scores on balance and posture were more likely to have sialorrhea, Dr. Cociasu said she and her colleagues are currently looking into this.

Dr. Morgante said that the current study did not examine the effect of treatment on speech disorders associated with sialorrhea. “We are running another study now to understand the effect of treatment of sialorrhea on these features,” she said.

Dr. Morgante and Dr. Cociasu have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

About one-third of individuals with adult-onset idiopathic dystonia experience major depression or dysthymia, data from a meta-analysis of 54 studies show.

Adult-onset idiopathic dystonia (AOID) is the third-most common movement disorder after essential tremor and Parkinson’s disease, and data show that depression and anxiety are the largest contributors to reduced quality of life in these patients, wrote Alex Medina Escobar, MD, of the University of Calgary (Alta.), and colleagues. However, “the pathogenic mechanisms of depression and anxiety in AOID remain unclear” and might involve a combination of biologic factors, as well as social stigma.

In the meta-analysis, published in Neuroscience and Biobehavioral Reviews, the researchers examined the point prevalence of supraclinical threshold depressive symptoms/depressive disorders in AOID using 54 studies. The resulting study population included 12,635 patients: 6,977 with cervical dystonia, 732 with cranial dystonia, 4,504 with mixed forms, 303 with laryngeal dystonia, and 119 with upper-limb dystonia. The studies were published between 1988 and 2020, and included patients from 21 countries in 52 single-center studies and 2 multicenter studies.

Overall, the pooled prevalence of either supraclinical threshold depressive symptoms or depressive disorders was 31.5% for cervical dystonia, 29.2 % for cranial dystonia, and 33.6 % for clinical samples with mixed forms of AOID.

Among patients with cervical dystonia, major depressive disorder was more prevalent than dysthymia, but among patients with cranial dystonia, dysthymia was more prevalent. Among patients with mixed forms, the prevalence of major depressive disorder was higher than dysthymia. Heterogeneity varied among the studies but was higher in studies that used rating scales.

Treatment of patients with AOID does not take into account the impact of depression on quality of life, Dr. Escobar and colleagues reported.

“The current model of care for AOID remains primarily centered on the treatment of the movement disorder with local injections of botulinum toxin. Such model appears to be inefficient to guarantee resources to address these comorbidities within secondary or tertiary care, or through shared care pathways engaging both primary and hospital-based care.” They also said the use of antidepressants and cognitive-behavioral therapy as a way to target negative body concept or social stigma among these patients are “underexplored and underutilized.”

The study findings were limited by several factors, including the inclusion only of studies published in English. In addition, most of the studies were conducted at movement disorders clinics, which may have yielded a patient population with more severe AOID. Further limitations included the inability to perform subgroup analysis based on demographic and clinical factors, and the insufficient number of studies for meta-analysis of laryngeal and hand dystonia, Dr. Escobar and colleagues added.

However, the results represent the first pooled estimate of depression prevalence in AOID and confirm a high prevalence across different clinical forms, the researchers said. The heterogeneity across studies highlights the need for standardized screening for depression and improved diagnosis of mood disorders in AOID.

“The meta-analytic estimates provided here will be highly useful for the planning of future mechanistic and interventional studies, as well as for the redefinition of current models of care,” they concluded.

The study received no outside funding. Dr. Escobar and colleagues had no disclosures.

About one-third of individuals with adult-onset idiopathic dystonia experience major depression or dysthymia, data from a meta-analysis of 54 studies show.

Adult-onset idiopathic dystonia (AOID) is the third-most common movement disorder after essential tremor and Parkinson’s disease, and data show that depression and anxiety are the largest contributors to reduced quality of life in these patients, wrote Alex Medina Escobar, MD, of the University of Calgary (Alta.), and colleagues. However, “the pathogenic mechanisms of depression and anxiety in AOID remain unclear” and might involve a combination of biologic factors, as well as social stigma.

In the meta-analysis, published in Neuroscience and Biobehavioral Reviews, the researchers examined the point prevalence of supraclinical threshold depressive symptoms/depressive disorders in AOID using 54 studies. The resulting study population included 12,635 patients: 6,977 with cervical dystonia, 732 with cranial dystonia, 4,504 with mixed forms, 303 with laryngeal dystonia, and 119 with upper-limb dystonia. The studies were published between 1988 and 2020, and included patients from 21 countries in 52 single-center studies and 2 multicenter studies.

Overall, the pooled prevalence of either supraclinical threshold depressive symptoms or depressive disorders was 31.5% for cervical dystonia, 29.2 % for cranial dystonia, and 33.6 % for clinical samples with mixed forms of AOID.

Among patients with cervical dystonia, major depressive disorder was more prevalent than dysthymia, but among patients with cranial dystonia, dysthymia was more prevalent. Among patients with mixed forms, the prevalence of major depressive disorder was higher than dysthymia. Heterogeneity varied among the studies but was higher in studies that used rating scales.

Treatment of patients with AOID does not take into account the impact of depression on quality of life, Dr. Escobar and colleagues reported.

“The current model of care for AOID remains primarily centered on the treatment of the movement disorder with local injections of botulinum toxin. Such model appears to be inefficient to guarantee resources to address these comorbidities within secondary or tertiary care, or through shared care pathways engaging both primary and hospital-based care.” They also said the use of antidepressants and cognitive-behavioral therapy as a way to target negative body concept or social stigma among these patients are “underexplored and underutilized.”

The study findings were limited by several factors, including the inclusion only of studies published in English. In addition, most of the studies were conducted at movement disorders clinics, which may have yielded a patient population with more severe AOID. Further limitations included the inability to perform subgroup analysis based on demographic and clinical factors, and the insufficient number of studies for meta-analysis of laryngeal and hand dystonia, Dr. Escobar and colleagues added.

However, the results represent the first pooled estimate of depression prevalence in AOID and confirm a high prevalence across different clinical forms, the researchers said. The heterogeneity across studies highlights the need for standardized screening for depression and improved diagnosis of mood disorders in AOID.

“The meta-analytic estimates provided here will be highly useful for the planning of future mechanistic and interventional studies, as well as for the redefinition of current models of care,” they concluded.

The study received no outside funding. Dr. Escobar and colleagues had no disclosures.

About one-third of individuals with adult-onset idiopathic dystonia experience major depression or dysthymia, data from a meta-analysis of 54 studies show.

Adult-onset idiopathic dystonia (AOID) is the third-most common movement disorder after essential tremor and Parkinson’s disease, and data show that depression and anxiety are the largest contributors to reduced quality of life in these patients, wrote Alex Medina Escobar, MD, of the University of Calgary (Alta.), and colleagues. However, “the pathogenic mechanisms of depression and anxiety in AOID remain unclear” and might involve a combination of biologic factors, as well as social stigma.

In the meta-analysis, published in Neuroscience and Biobehavioral Reviews, the researchers examined the point prevalence of supraclinical threshold depressive symptoms/depressive disorders in AOID using 54 studies. The resulting study population included 12,635 patients: 6,977 with cervical dystonia, 732 with cranial dystonia, 4,504 with mixed forms, 303 with laryngeal dystonia, and 119 with upper-limb dystonia. The studies were published between 1988 and 2020, and included patients from 21 countries in 52 single-center studies and 2 multicenter studies.

Overall, the pooled prevalence of either supraclinical threshold depressive symptoms or depressive disorders was 31.5% for cervical dystonia, 29.2 % for cranial dystonia, and 33.6 % for clinical samples with mixed forms of AOID.

Among patients with cervical dystonia, major depressive disorder was more prevalent than dysthymia, but among patients with cranial dystonia, dysthymia was more prevalent. Among patients with mixed forms, the prevalence of major depressive disorder was higher than dysthymia. Heterogeneity varied among the studies but was higher in studies that used rating scales.

Treatment of patients with AOID does not take into account the impact of depression on quality of life, Dr. Escobar and colleagues reported.

“The current model of care for AOID remains primarily centered on the treatment of the movement disorder with local injections of botulinum toxin. Such model appears to be inefficient to guarantee resources to address these comorbidities within secondary or tertiary care, or through shared care pathways engaging both primary and hospital-based care.” They also said the use of antidepressants and cognitive-behavioral therapy as a way to target negative body concept or social stigma among these patients are “underexplored and underutilized.”

The study findings were limited by several factors, including the inclusion only of studies published in English. In addition, most of the studies were conducted at movement disorders clinics, which may have yielded a patient population with more severe AOID. Further limitations included the inability to perform subgroup analysis based on demographic and clinical factors, and the insufficient number of studies for meta-analysis of laryngeal and hand dystonia, Dr. Escobar and colleagues added.

However, the results represent the first pooled estimate of depression prevalence in AOID and confirm a high prevalence across different clinical forms, the researchers said. The heterogeneity across studies highlights the need for standardized screening for depression and improved diagnosis of mood disorders in AOID.

“The meta-analytic estimates provided here will be highly useful for the planning of future mechanistic and interventional studies, as well as for the redefinition of current models of care,” they concluded.

The study received no outside funding. Dr. Escobar and colleagues had no disclosures.