Movement Disorders

Schizophrenia patients with parkinsonism show distinctive patterns of cortical surface markers, compared with schizophrenia patients without parkinsonism and healthy controls, results of a multimodal magnetic resonance imaging study suggest.

Sensorimotor abnormalities are common in schizophrenia patients, however, “the neurobiological mechanisms underlying parkinsonism in [schizophrenia], which in treated samples represents the unity of interplay between spontaneous and antipsychotic drug-exacerbated movement disorder, are poorly understood,” wrote Robert Christian Wolf, MD, of Heidelberg (Germany) University, and colleagues.

In a study published in Schizophrenia Research (2021 May;231:54-60), the investigators examined brain imaging findings from 20 healthy controls, 38 schizophrenia patients with parkinsonism (SZ-P), and 35 schizophrenia patients without parkinsonism (SZ-nonP). Dr. Wolf and colleagues examined three cortical surface markers: cortical thickness, complexity of cortical folding, and sulcus depth.

Compared with SZ-nonP patients, the SZ-P patients showed significantly increased complexity of cortical folding in the left supplementary motor cortex (SMC) and significantly decreased left postcentral sulcus (PCS) depth. In addition, left SMC activity was higher in both SZ-P and SZ-nonP patient groups, compared with controls.

In a regression analysis, the researchers examined relationships between parkinsonism severity and brain structure. They found that parkinsonism severity was negatively associated with left middle frontal complexity of cortical folding and left anterior cingulate cortex cortical thickness.

“Overall, the data support the notion that cortical features of distinct neurodevelopmental origin, particularly cortical folding indices such as [complexity of cortical folding] and sulcus depth, contribute to the pathogenesis of parkinsonism in SZ,” the researchers wrote.

The study findings were limited by several factors, including the cross-sectional design, the potential limitations of the Simpson-Angus Scale in characterizing parkinsonism, the inability to record lifetime antibiotics exposure in the patient population, and the inability to identify changes in brain stem nuclei, the researchers noted. However, the results were strengthened by the well-matched study groups and use of multimodal MRI, they said.

Consequently, “these data provide novel insights into different trajectories of cortical development in SZ patients evidencing parkinsonism,” and suggest a link between abnormal neurodevelopmental processes and an increased risk for movement disorders in schizophrenia, they concluded.

The study was funded by the German Research Foundation and the German Federal Ministry of Education and Research. Dr. Wolf and colleagues disclosed no conflicts.

Schizophrenia patients with parkinsonism show distinctive patterns of cortical surface markers, compared with schizophrenia patients without parkinsonism and healthy controls, results of a multimodal magnetic resonance imaging study suggest.

Sensorimotor abnormalities are common in schizophrenia patients, however, “the neurobiological mechanisms underlying parkinsonism in [schizophrenia], which in treated samples represents the unity of interplay between spontaneous and antipsychotic drug-exacerbated movement disorder, are poorly understood,” wrote Robert Christian Wolf, MD, of Heidelberg (Germany) University, and colleagues.

In a study published in Schizophrenia Research (2021 May;231:54-60), the investigators examined brain imaging findings from 20 healthy controls, 38 schizophrenia patients with parkinsonism (SZ-P), and 35 schizophrenia patients without parkinsonism (SZ-nonP). Dr. Wolf and colleagues examined three cortical surface markers: cortical thickness, complexity of cortical folding, and sulcus depth.

Compared with SZ-nonP patients, the SZ-P patients showed significantly increased complexity of cortical folding in the left supplementary motor cortex (SMC) and significantly decreased left postcentral sulcus (PCS) depth. In addition, left SMC activity was higher in both SZ-P and SZ-nonP patient groups, compared with controls.

In a regression analysis, the researchers examined relationships between parkinsonism severity and brain structure. They found that parkinsonism severity was negatively associated with left middle frontal complexity of cortical folding and left anterior cingulate cortex cortical thickness.

“Overall, the data support the notion that cortical features of distinct neurodevelopmental origin, particularly cortical folding indices such as [complexity of cortical folding] and sulcus depth, contribute to the pathogenesis of parkinsonism in SZ,” the researchers wrote.

The study findings were limited by several factors, including the cross-sectional design, the potential limitations of the Simpson-Angus Scale in characterizing parkinsonism, the inability to record lifetime antibiotics exposure in the patient population, and the inability to identify changes in brain stem nuclei, the researchers noted. However, the results were strengthened by the well-matched study groups and use of multimodal MRI, they said.

Consequently, “these data provide novel insights into different trajectories of cortical development in SZ patients evidencing parkinsonism,” and suggest a link between abnormal neurodevelopmental processes and an increased risk for movement disorders in schizophrenia, they concluded.

The study was funded by the German Research Foundation and the German Federal Ministry of Education and Research. Dr. Wolf and colleagues disclosed no conflicts.

Schizophrenia patients with parkinsonism show distinctive patterns of cortical surface markers, compared with schizophrenia patients without parkinsonism and healthy controls, results of a multimodal magnetic resonance imaging study suggest.

Sensorimotor abnormalities are common in schizophrenia patients, however, “the neurobiological mechanisms underlying parkinsonism in [schizophrenia], which in treated samples represents the unity of interplay between spontaneous and antipsychotic drug-exacerbated movement disorder, are poorly understood,” wrote Robert Christian Wolf, MD, of Heidelberg (Germany) University, and colleagues.

In a study published in Schizophrenia Research (2021 May;231:54-60), the investigators examined brain imaging findings from 20 healthy controls, 38 schizophrenia patients with parkinsonism (SZ-P), and 35 schizophrenia patients without parkinsonism (SZ-nonP). Dr. Wolf and colleagues examined three cortical surface markers: cortical thickness, complexity of cortical folding, and sulcus depth.

Compared with SZ-nonP patients, the SZ-P patients showed significantly increased complexity of cortical folding in the left supplementary motor cortex (SMC) and significantly decreased left postcentral sulcus (PCS) depth. In addition, left SMC activity was higher in both SZ-P and SZ-nonP patient groups, compared with controls.

In a regression analysis, the researchers examined relationships between parkinsonism severity and brain structure. They found that parkinsonism severity was negatively associated with left middle frontal complexity of cortical folding and left anterior cingulate cortex cortical thickness.

“Overall, the data support the notion that cortical features of distinct neurodevelopmental origin, particularly cortical folding indices such as [complexity of cortical folding] and sulcus depth, contribute to the pathogenesis of parkinsonism in SZ,” the researchers wrote.

The study findings were limited by several factors, including the cross-sectional design, the potential limitations of the Simpson-Angus Scale in characterizing parkinsonism, the inability to record lifetime antibiotics exposure in the patient population, and the inability to identify changes in brain stem nuclei, the researchers noted. However, the results were strengthened by the well-matched study groups and use of multimodal MRI, they said.

Consequently, “these data provide novel insights into different trajectories of cortical development in SZ patients evidencing parkinsonism,” and suggest a link between abnormal neurodevelopmental processes and an increased risk for movement disorders in schizophrenia, they concluded.

The study was funded by the German Research Foundation and the German Federal Ministry of Education and Research. Dr. Wolf and colleagues disclosed no conflicts.

Managing depression and anxiety in Parkinson’s disease should start with a review of medications and involve multidisciplinary care, according to a recent summary of evidence.

“Depression and anxiety have a complex relationship with the disease and while the exact mechanism for this association is unknown, both disturbances occur with increased prevalence across the disease course and when present earlier in life, increase the risk of PD by about twofold,” wrote Gregory M. Pontone, MD, of Johns Hopkins University, Baltimore, and colleagues.

Randomized trials to guide treatment of anxiety and depression in patients with Parkinson’s disease (PD) are limited, the researchers noted. However, data from a longitudinal study showed that PD patients whose depression remitted spontaneously or responded to treatment were able to attain a level of function similar to that of never-depressed PD patients, Dr. Pontone and colleagues said.

The researchers offered a pair of treatment algorithms to help guide clinicians in managing depression and anxiety in PD. However, a caveat to keep in mind is that “the benefit of antidepressant medications, used for depression or anxiety, can be confounded when motor symptoms are not optimally treated,” the researchers emphasized.

For depression, the researchers advised starting with some lab work; “at a minimum we suggest checking a complete blood count, metabolic panel, TSH, B12, and folate,” they noted. They recommended an antidepressant, cognitive-behavioral therapy, or both, as a first-line treatment, such as monotherapy with selective norepinephrine reuptake inhibitors or selective serotonin reuptake inhibitors. They advised titrating the chosen monotherapy to a minimum effective dose over a 2- to 3-week period to assess response.

“We recommend continuing antidepressant therapy for at least 1 year based on literature in non-PD populations and anecdotal clinical experience. At 1 year, if not in remission, consider continuing treatment or augmenting to improve response,” the researchers said.

Based on the current DSM-5 criteria, up to one-third of PD patients have an unspecified anxiety disorder, the researchers said, and they recommended using anxiety rating scales to diagnose anxiety in PD. “Given the high prevalence of atypical anxiety syndromes in PD and their potential association with both motor and nonmotor symptoms of the disease, working with the neurologist to achieve optimal control of PD is an essential first step to alleviating anxiety,” they emphasized.

The researchers also advised addressing comorbidities, including cardiovascular disease, chronic pain, diabetes, gastrointestinal issues, hyperthyroidism, and lung disease, all of which can be associated with anxiety. Once comorbidities are addressed, they advised caution given the lack of evidence for efficacy of both pharmacologic and nonpharmacologic anxiety treatments for PD patients. However, first-tier treatment for anxiety could include monotherapy with serotonin-norepinephrine reuptake inhibitors or selective serotonin reuptake inhibitors, they said.

PD patients with depression and anxiety also may benefit from nonpharmacologic interventions, including exercise, mindfulness, relaxation therapy, and cognitive behavioral therapy the researchers said.

Although the algorithm may not differ significantly from current treatment protocols, it highlights aspects unique to PD patients, the researchers said. In particular, the algorithm shows “that interventions used for motor symptoms, for example, dopamine agonists, may be especially potent for mood in the PD population and that augmentation strategies, such as antipsychotics and lithium, may not be well tolerated given their outsized risk of adverse events in PD,” they said.

“While an article of this kind cannot hope to address the gap in knowledge on comparative efficacy between interventions, it can guide readers on the best strategies for implementation and risk mitigation in PD – essentially focusing more on effectiveness,” they concluded.

The study received no outside funding. Dr. Pontone disclosed serving as a consultant for Acadia Pharmaceuticals and Concert Pharmaceuticals.

Managing depression and anxiety in Parkinson’s disease should start with a review of medications and involve multidisciplinary care, according to a recent summary of evidence.

“Depression and anxiety have a complex relationship with the disease and while the exact mechanism for this association is unknown, both disturbances occur with increased prevalence across the disease course and when present earlier in life, increase the risk of PD by about twofold,” wrote Gregory M. Pontone, MD, of Johns Hopkins University, Baltimore, and colleagues.

Randomized trials to guide treatment of anxiety and depression in patients with Parkinson’s disease (PD) are limited, the researchers noted. However, data from a longitudinal study showed that PD patients whose depression remitted spontaneously or responded to treatment were able to attain a level of function similar to that of never-depressed PD patients, Dr. Pontone and colleagues said.

The researchers offered a pair of treatment algorithms to help guide clinicians in managing depression and anxiety in PD. However, a caveat to keep in mind is that “the benefit of antidepressant medications, used for depression or anxiety, can be confounded when motor symptoms are not optimally treated,” the researchers emphasized.

For depression, the researchers advised starting with some lab work; “at a minimum we suggest checking a complete blood count, metabolic panel, TSH, B12, and folate,” they noted. They recommended an antidepressant, cognitive-behavioral therapy, or both, as a first-line treatment, such as monotherapy with selective norepinephrine reuptake inhibitors or selective serotonin reuptake inhibitors. They advised titrating the chosen monotherapy to a minimum effective dose over a 2- to 3-week period to assess response.

“We recommend continuing antidepressant therapy for at least 1 year based on literature in non-PD populations and anecdotal clinical experience. At 1 year, if not in remission, consider continuing treatment or augmenting to improve response,” the researchers said.

Based on the current DSM-5 criteria, up to one-third of PD patients have an unspecified anxiety disorder, the researchers said, and they recommended using anxiety rating scales to diagnose anxiety in PD. “Given the high prevalence of atypical anxiety syndromes in PD and their potential association with both motor and nonmotor symptoms of the disease, working with the neurologist to achieve optimal control of PD is an essential first step to alleviating anxiety,” they emphasized.

The researchers also advised addressing comorbidities, including cardiovascular disease, chronic pain, diabetes, gastrointestinal issues, hyperthyroidism, and lung disease, all of which can be associated with anxiety. Once comorbidities are addressed, they advised caution given the lack of evidence for efficacy of both pharmacologic and nonpharmacologic anxiety treatments for PD patients. However, first-tier treatment for anxiety could include monotherapy with serotonin-norepinephrine reuptake inhibitors or selective serotonin reuptake inhibitors, they said.

PD patients with depression and anxiety also may benefit from nonpharmacologic interventions, including exercise, mindfulness, relaxation therapy, and cognitive behavioral therapy the researchers said.

Although the algorithm may not differ significantly from current treatment protocols, it highlights aspects unique to PD patients, the researchers said. In particular, the algorithm shows “that interventions used for motor symptoms, for example, dopamine agonists, may be especially potent for mood in the PD population and that augmentation strategies, such as antipsychotics and lithium, may not be well tolerated given their outsized risk of adverse events in PD,” they said.

“While an article of this kind cannot hope to address the gap in knowledge on comparative efficacy between interventions, it can guide readers on the best strategies for implementation and risk mitigation in PD – essentially focusing more on effectiveness,” they concluded.

The study received no outside funding. Dr. Pontone disclosed serving as a consultant for Acadia Pharmaceuticals and Concert Pharmaceuticals.

Managing depression and anxiety in Parkinson’s disease should start with a review of medications and involve multidisciplinary care, according to a recent summary of evidence.

“Depression and anxiety have a complex relationship with the disease and while the exact mechanism for this association is unknown, both disturbances occur with increased prevalence across the disease course and when present earlier in life, increase the risk of PD by about twofold,” wrote Gregory M. Pontone, MD, of Johns Hopkins University, Baltimore, and colleagues.

Randomized trials to guide treatment of anxiety and depression in patients with Parkinson’s disease (PD) are limited, the researchers noted. However, data from a longitudinal study showed that PD patients whose depression remitted spontaneously or responded to treatment were able to attain a level of function similar to that of never-depressed PD patients, Dr. Pontone and colleagues said.

The researchers offered a pair of treatment algorithms to help guide clinicians in managing depression and anxiety in PD. However, a caveat to keep in mind is that “the benefit of antidepressant medications, used for depression or anxiety, can be confounded when motor symptoms are not optimally treated,” the researchers emphasized.

For depression, the researchers advised starting with some lab work; “at a minimum we suggest checking a complete blood count, metabolic panel, TSH, B12, and folate,” they noted. They recommended an antidepressant, cognitive-behavioral therapy, or both, as a first-line treatment, such as monotherapy with selective norepinephrine reuptake inhibitors or selective serotonin reuptake inhibitors. They advised titrating the chosen monotherapy to a minimum effective dose over a 2- to 3-week period to assess response.

“We recommend continuing antidepressant therapy for at least 1 year based on literature in non-PD populations and anecdotal clinical experience. At 1 year, if not in remission, consider continuing treatment or augmenting to improve response,” the researchers said.

Based on the current DSM-5 criteria, up to one-third of PD patients have an unspecified anxiety disorder, the researchers said, and they recommended using anxiety rating scales to diagnose anxiety in PD. “Given the high prevalence of atypical anxiety syndromes in PD and their potential association with both motor and nonmotor symptoms of the disease, working with the neurologist to achieve optimal control of PD is an essential first step to alleviating anxiety,” they emphasized.

The researchers also advised addressing comorbidities, including cardiovascular disease, chronic pain, diabetes, gastrointestinal issues, hyperthyroidism, and lung disease, all of which can be associated with anxiety. Once comorbidities are addressed, they advised caution given the lack of evidence for efficacy of both pharmacologic and nonpharmacologic anxiety treatments for PD patients. However, first-tier treatment for anxiety could include monotherapy with serotonin-norepinephrine reuptake inhibitors or selective serotonin reuptake inhibitors, they said.

PD patients with depression and anxiety also may benefit from nonpharmacologic interventions, including exercise, mindfulness, relaxation therapy, and cognitive behavioral therapy the researchers said.

Although the algorithm may not differ significantly from current treatment protocols, it highlights aspects unique to PD patients, the researchers said. In particular, the algorithm shows “that interventions used for motor symptoms, for example, dopamine agonists, may be especially potent for mood in the PD population and that augmentation strategies, such as antipsychotics and lithium, may not be well tolerated given their outsized risk of adverse events in PD,” they said.

“While an article of this kind cannot hope to address the gap in knowledge on comparative efficacy between interventions, it can guide readers on the best strategies for implementation and risk mitigation in PD – essentially focusing more on effectiveness,” they concluded.

The study received no outside funding. Dr. Pontone disclosed serving as a consultant for Acadia Pharmaceuticals and Concert Pharmaceuticals.

The Food and Drug Administration has approved Medtronic’s technologically advanced deep brain stimulation (DBS) system designed to more precisely target motor symptoms in Parkinson’s disease, dystonia, or essential tremor.

The SenSight Directional Lead System for DBS therapy combines two recent advancements: sensing capability that allows real-time monitoring of brain signals to optimize settings for stimulation, and a “directional lead” that enables steering of electric current for more precise targeting of stimulation through the electrode.

“Until now, sensing capability and directional leads have not been available in the same DBS system, so we have had to choose one technology or the other, based on the predicted needs of each patient,” neurosurgeon Kelly Foote, MD, who performed the first implant of the SenSight System at University of Florida (UF) Health, said in a news release.

“Now, by coupling this new directional lead with a pulse generator capable of brain sensing, we are excited to be able to offer our patients the synergistic benefits of both technologies,” added Dr. Foote, codirector of the Norman Fixel Institute for Neurological Diseases at UF Health.

Dr. Foote said DBS systems capable of adjusting therapeutic stimulation in response to continuously recorded brain signals may lead to better DBS outcomes with fewer adverse effects.

“Adding a directional lead to such a system will improve our ability to localize abnormal signals and enable us to steer current more effectively to areas in the brain where it is most beneficial,” Dr. Foote said.

“We are excited to see the clinical benefits that the new SenSight directional lead system will provide to patients and physicians in the U.S.,” added Mike Daly, vice president and general manager of brain modulation at Medtronic.

Medtronic’s SenSight directional lead DBS system received CE Mark approval in Europe in March.
 

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

The Food and Drug Administration has approved Medtronic’s technologically advanced deep brain stimulation (DBS) system designed to more precisely target motor symptoms in Parkinson’s disease, dystonia, or essential tremor.

The SenSight Directional Lead System for DBS therapy combines two recent advancements: sensing capability that allows real-time monitoring of brain signals to optimize settings for stimulation, and a “directional lead” that enables steering of electric current for more precise targeting of stimulation through the electrode.

“Until now, sensing capability and directional leads have not been available in the same DBS system, so we have had to choose one technology or the other, based on the predicted needs of each patient,” neurosurgeon Kelly Foote, MD, who performed the first implant of the SenSight System at University of Florida (UF) Health, said in a news release.

“Now, by coupling this new directional lead with a pulse generator capable of brain sensing, we are excited to be able to offer our patients the synergistic benefits of both technologies,” added Dr. Foote, codirector of the Norman Fixel Institute for Neurological Diseases at UF Health.

Dr. Foote said DBS systems capable of adjusting therapeutic stimulation in response to continuously recorded brain signals may lead to better DBS outcomes with fewer adverse effects.

“Adding a directional lead to such a system will improve our ability to localize abnormal signals and enable us to steer current more effectively to areas in the brain where it is most beneficial,” Dr. Foote said.

“We are excited to see the clinical benefits that the new SenSight directional lead system will provide to patients and physicians in the U.S.,” added Mike Daly, vice president and general manager of brain modulation at Medtronic.

Medtronic’s SenSight directional lead DBS system received CE Mark approval in Europe in March.
 

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

The Food and Drug Administration has approved Medtronic’s technologically advanced deep brain stimulation (DBS) system designed to more precisely target motor symptoms in Parkinson’s disease, dystonia, or essential tremor.

The SenSight Directional Lead System for DBS therapy combines two recent advancements: sensing capability that allows real-time monitoring of brain signals to optimize settings for stimulation, and a “directional lead” that enables steering of electric current for more precise targeting of stimulation through the electrode.

“Until now, sensing capability and directional leads have not been available in the same DBS system, so we have had to choose one technology or the other, based on the predicted needs of each patient,” neurosurgeon Kelly Foote, MD, who performed the first implant of the SenSight System at University of Florida (UF) Health, said in a news release.

“Now, by coupling this new directional lead with a pulse generator capable of brain sensing, we are excited to be able to offer our patients the synergistic benefits of both technologies,” added Dr. Foote, codirector of the Norman Fixel Institute for Neurological Diseases at UF Health.

Dr. Foote said DBS systems capable of adjusting therapeutic stimulation in response to continuously recorded brain signals may lead to better DBS outcomes with fewer adverse effects.

“Adding a directional lead to such a system will improve our ability to localize abnormal signals and enable us to steer current more effectively to areas in the brain where it is most beneficial,” Dr. Foote said.

“We are excited to see the clinical benefits that the new SenSight directional lead system will provide to patients and physicians in the U.S.,” added Mike Daly, vice president and general manager of brain modulation at Medtronic.

Medtronic’s SenSight directional lead DBS system received CE Mark approval in Europe in March.
 

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

Subthalamic nucleus deep brain stimulation (STN-DBS) continues to be effective for patients with Parkinson’s disease more than 15 years after device implantation, with significant improvement in motor complications and a stable reduction in dopaminergic drug use, new research indicates.

“Subthalamic nucleus stimulation is a well recognized treatment used for improving motor conditions and quality of life in people with Parkinson’s disease. Our study, for the first time, supports its efficacy in the very long term – 15 years after surgery and 25 years since the Parkinson’s disease diagnosis,” said Elena Moro, MD, PhD, Grenoble Alpes University, Grenoble, France.

“This information is relevant for physicians, patients, and their families when they need to decide about the surgical option to deal with Parkinson’s disease,” said Dr. Moro.

The study was published online June 2 in Neurology.
 

‘Don’t delay’

The findings are based on 51 patients with Parkinson’s disease who underwent treatment with bilateral STN-DBS for an average of 17 years (range, 15-24 years). Their average age at diagnosis was 40 years, and the average age at device implantation was 51 years.

The results demonstrate that STN-DBS continues to be effective for motor complications for longer than 15 years, reducing time spent with dyskinesia by 75% and time spent in the off-state by 58.7%. This is similar to the amount of improvement seen 1 year after surgery.

Doses of dopaminergic medications continued to be low at long-term follow-up; dosing was reduced by 50.6% compared with baseline.

There was also continued improvement in quality of life. Scores on the Parkinson’s Disease Quality of Life Questionnaire in the very long term were 13.8% better compared with baseline.

“Few and mostly manageable device-related adverse events were observed during the follow-up,” the authors reported in their article.

“Deep brain stimulation is already recommended when a patient’s conditions are not optimized by medical treatment. Patients with Parkinson’s disease without dementia and in good general health conditions are the best candidates for this surgery,” said Dr. Moro.

“Taking into account our results and the data available in the literature, DBS surgery should not be delayed when motor conditions and quality of life decline despite medical treatment, if patients meet the inclusion criteria,” she added.
 

A revolutionary treatment

The authors of an accompanying editorial say these results, which indicate better motor outcomes with less medication, “reinforce why STN-DBS has revolutionized treatment for advanced Parkinson’s disease.”

Kelvin Chou, MD, of the University of Michigan, Ann Arbor, and David Charles, MD, of Vanderbilt University, Nashville, Tenn., pointed out that longer disease duration is associated with an increase in the likelihood of cognitive impairment and psychosis, both of which are risk factors for nursing home placement, and they limit the ability to use dopaminergic medications.

Although many of the patients in this cohort experienced hallucinations and psychosis over the long follow-up period, “one can imagine that the number and severity would be higher without DBS therapy,” they wrote.

Key caveats, said Dr. Chou and Dr. Charles, are that the results are based on a highly selected cohort and that the patients were managed by experts in the field of movement disorders and DBS.

Additionally, the patients’ conditions were highly responsive to levodopa; there was a 75.3% baseline improvement in Unified Parkinson’s Disease Rating Scale motor scores from the off-state to the on-state. In general, most DBS centers consider a levodopa response of approximately 30% as an acceptable cutoff for moving forward with STN-DBS, they noted.

Despite these caveats and limitations, the results of the study are important with respect to counseling potential candidates for DBS, Dr. Chou and Dr. Charles said.

“A common question that patients have is, ‘How long do the benefits of DBS last?’ We can now reassure them that, at least for STN-DBS, improvement in motor complications lasts beyond 15 years and is often accompanied by improvement in quality of life. In other words, with STN-DBS, we can uncomplicate their motor complications for the long haul,” the editorial writers concluded.

The research had no targeted funding. Moro has received honoraria from Medtronic and Abbott for consulting and lecturing and an educational grant from Boston and Newronika. A complete list of disclosures is available with the original articles.

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

Subthalamic nucleus deep brain stimulation (STN-DBS) continues to be effective for patients with Parkinson’s disease more than 15 years after device implantation, with significant improvement in motor complications and a stable reduction in dopaminergic drug use, new research indicates.

“Subthalamic nucleus stimulation is a well recognized treatment used for improving motor conditions and quality of life in people with Parkinson’s disease. Our study, for the first time, supports its efficacy in the very long term – 15 years after surgery and 25 years since the Parkinson’s disease diagnosis,” said Elena Moro, MD, PhD, Grenoble Alpes University, Grenoble, France.

“This information is relevant for physicians, patients, and their families when they need to decide about the surgical option to deal with Parkinson’s disease,” said Dr. Moro.

The study was published online June 2 in Neurology.
 

‘Don’t delay’

The findings are based on 51 patients with Parkinson’s disease who underwent treatment with bilateral STN-DBS for an average of 17 years (range, 15-24 years). Their average age at diagnosis was 40 years, and the average age at device implantation was 51 years.

The results demonstrate that STN-DBS continues to be effective for motor complications for longer than 15 years, reducing time spent with dyskinesia by 75% and time spent in the off-state by 58.7%. This is similar to the amount of improvement seen 1 year after surgery.

Doses of dopaminergic medications continued to be low at long-term follow-up; dosing was reduced by 50.6% compared with baseline.

There was also continued improvement in quality of life. Scores on the Parkinson’s Disease Quality of Life Questionnaire in the very long term were 13.8% better compared with baseline.

“Few and mostly manageable device-related adverse events were observed during the follow-up,” the authors reported in their article.

“Deep brain stimulation is already recommended when a patient’s conditions are not optimized by medical treatment. Patients with Parkinson’s disease without dementia and in good general health conditions are the best candidates for this surgery,” said Dr. Moro.

“Taking into account our results and the data available in the literature, DBS surgery should not be delayed when motor conditions and quality of life decline despite medical treatment, if patients meet the inclusion criteria,” she added.
 

A revolutionary treatment

The authors of an accompanying editorial say these results, which indicate better motor outcomes with less medication, “reinforce why STN-DBS has revolutionized treatment for advanced Parkinson’s disease.”

Kelvin Chou, MD, of the University of Michigan, Ann Arbor, and David Charles, MD, of Vanderbilt University, Nashville, Tenn., pointed out that longer disease duration is associated with an increase in the likelihood of cognitive impairment and psychosis, both of which are risk factors for nursing home placement, and they limit the ability to use dopaminergic medications.

Although many of the patients in this cohort experienced hallucinations and psychosis over the long follow-up period, “one can imagine that the number and severity would be higher without DBS therapy,” they wrote.

Key caveats, said Dr. Chou and Dr. Charles, are that the results are based on a highly selected cohort and that the patients were managed by experts in the field of movement disorders and DBS.

Additionally, the patients’ conditions were highly responsive to levodopa; there was a 75.3% baseline improvement in Unified Parkinson’s Disease Rating Scale motor scores from the off-state to the on-state. In general, most DBS centers consider a levodopa response of approximately 30% as an acceptable cutoff for moving forward with STN-DBS, they noted.

Despite these caveats and limitations, the results of the study are important with respect to counseling potential candidates for DBS, Dr. Chou and Dr. Charles said.

“A common question that patients have is, ‘How long do the benefits of DBS last?’ We can now reassure them that, at least for STN-DBS, improvement in motor complications lasts beyond 15 years and is often accompanied by improvement in quality of life. In other words, with STN-DBS, we can uncomplicate their motor complications for the long haul,” the editorial writers concluded.

The research had no targeted funding. Moro has received honoraria from Medtronic and Abbott for consulting and lecturing and an educational grant from Boston and Newronika. A complete list of disclosures is available with the original articles.

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

Subthalamic nucleus deep brain stimulation (STN-DBS) continues to be effective for patients with Parkinson’s disease more than 15 years after device implantation, with significant improvement in motor complications and a stable reduction in dopaminergic drug use, new research indicates.

“Subthalamic nucleus stimulation is a well recognized treatment used for improving motor conditions and quality of life in people with Parkinson’s disease. Our study, for the first time, supports its efficacy in the very long term – 15 years after surgery and 25 years since the Parkinson’s disease diagnosis,” said Elena Moro, MD, PhD, Grenoble Alpes University, Grenoble, France.

“This information is relevant for physicians, patients, and their families when they need to decide about the surgical option to deal with Parkinson’s disease,” said Dr. Moro.

The study was published online June 2 in Neurology.
 

‘Don’t delay’

The findings are based on 51 patients with Parkinson’s disease who underwent treatment with bilateral STN-DBS for an average of 17 years (range, 15-24 years). Their average age at diagnosis was 40 years, and the average age at device implantation was 51 years.

The results demonstrate that STN-DBS continues to be effective for motor complications for longer than 15 years, reducing time spent with dyskinesia by 75% and time spent in the off-state by 58.7%. This is similar to the amount of improvement seen 1 year after surgery.

Doses of dopaminergic medications continued to be low at long-term follow-up; dosing was reduced by 50.6% compared with baseline.

There was also continued improvement in quality of life. Scores on the Parkinson’s Disease Quality of Life Questionnaire in the very long term were 13.8% better compared with baseline.

“Few and mostly manageable device-related adverse events were observed during the follow-up,” the authors reported in their article.

“Deep brain stimulation is already recommended when a patient’s conditions are not optimized by medical treatment. Patients with Parkinson’s disease without dementia and in good general health conditions are the best candidates for this surgery,” said Dr. Moro.

“Taking into account our results and the data available in the literature, DBS surgery should not be delayed when motor conditions and quality of life decline despite medical treatment, if patients meet the inclusion criteria,” she added.
 

A revolutionary treatment

The authors of an accompanying editorial say these results, which indicate better motor outcomes with less medication, “reinforce why STN-DBS has revolutionized treatment for advanced Parkinson’s disease.”

Kelvin Chou, MD, of the University of Michigan, Ann Arbor, and David Charles, MD, of Vanderbilt University, Nashville, Tenn., pointed out that longer disease duration is associated with an increase in the likelihood of cognitive impairment and psychosis, both of which are risk factors for nursing home placement, and they limit the ability to use dopaminergic medications.

Although many of the patients in this cohort experienced hallucinations and psychosis over the long follow-up period, “one can imagine that the number and severity would be higher without DBS therapy,” they wrote.

Key caveats, said Dr. Chou and Dr. Charles, are that the results are based on a highly selected cohort and that the patients were managed by experts in the field of movement disorders and DBS.

Additionally, the patients’ conditions were highly responsive to levodopa; there was a 75.3% baseline improvement in Unified Parkinson’s Disease Rating Scale motor scores from the off-state to the on-state. In general, most DBS centers consider a levodopa response of approximately 30% as an acceptable cutoff for moving forward with STN-DBS, they noted.

Despite these caveats and limitations, the results of the study are important with respect to counseling potential candidates for DBS, Dr. Chou and Dr. Charles said.

“A common question that patients have is, ‘How long do the benefits of DBS last?’ We can now reassure them that, at least for STN-DBS, improvement in motor complications lasts beyond 15 years and is often accompanied by improvement in quality of life. In other words, with STN-DBS, we can uncomplicate their motor complications for the long haul,” the editorial writers concluded.

The research had no targeted funding. Moro has received honoraria from Medtronic and Abbott for consulting and lecturing and an educational grant from Boston and Newronika. A complete list of disclosures is available with the original articles.

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

Young adults with epilepsy experience higher rates of anxiety, depression, and suicidality, compared with their counterparts in the general population, a new study shows.

The findings, based on a study of 144 young adults with epilepsy (YAWE), was published recently in Epilepsy & Behavior.

“People with epilepsy (PWE) are at a significantly higher risk of experiencing mental health difficulties, compared with healthy controls and individuals with other [long-term conditions] such as asthma and diabetes,” according to Rachel Batchelor, MSc, and Michelle D. Taylor, PhD, of the University of London (England) in Surrey.

Young adulthood, which encompasses people aged 18-25 years, has been identified as “a peak age of onset for anxiety and depression,” but mental health in young adults with epilepsy in particular has not been well studied, they wrote.

In the study, Ms. Batchelor and Dr. Taylor reviewed results of an online survey of 144 young adults with epilepsy aged 18-25 years. The survey measured current mental health symptoms, including anxiety, depression, and suicidality, as well as sociodemographic and epilepsy-related factors, coping strategies, and social support (Epilepsy Behav. 2021 May;118:107911. doi: 10.1016/j.yebeh.2021.107911).

The average age of the respondents was 21.6 years, 61% were female, and 88% were of White British ethnicity. A total of 88 participants were single, 48 were in a relationship, and 8 were married or engaged. About one-third (38%) worked full-time, and 28.5% were full-time university students, 18.8% worked part-time, and 8.3% were unemployed and not students. The average age of seizure onset was 12.4 years.

Overall, 116 (80.6%) of the survey respondents met the criteria for anxiety, 110 (76.4%) for depression, and 51 (35.4%) for suicidality.

Ratings of all three of these conditions were significantly higher in females, compared with males, the researchers noted. Anxiety, depression, and suicidality also were rated higher for individuals who waited more than 1 year vs. less than 1 year for an epilepsy diagnosis from the time of seizure onset, for those suffering from anti-seizure medication side effects vs. no side effects, and for those with comorbid conditions vs. no comorbid conditions.

Avoidant-focused coping strategies were positively correlated with anxiety, depression, and suicidality, while problem-focused coping and meaning-focused coping were negatively correlated, the researchers said. In addition, those who reported greater levels of support from friends had lower rates of anxiety and depression, and those who reported greater levels of support from family had lower rates of suicidality.

The study findings were limited by several factors, including the relatively homogenous population, and the absence of data on current anxiety and depression medications and additional professional support, the researchers noted.

However, the results extend the research on mental health in people with epilepsy, and the study is the first known to focus on the young adult population with epilepsy, they said.

“The high rates of anxiety, depression, and suicidality underscore the need for better integration of mental health provision into epilepsy care,” the researchers wrote. “While it would be premature to base recommendations for treating anxiety, depression, and suicidality in YAWE on the current study, investigating the efficacy of psychological interventions (for example, [acceptance and commitment therapy], [compassion-focused therapy], peer support, and family-based [therapy]) designed to address the psychosocial variables shown to independently predict mental health outcomes in YAWE would be worthy future research avenues,” they concluded.

The study received no outside funding, and the researchers disclosed no financial conflicts.

Young adults with epilepsy experience higher rates of anxiety, depression, and suicidality, compared with their counterparts in the general population, a new study shows.

The findings, based on a study of 144 young adults with epilepsy (YAWE), was published recently in Epilepsy & Behavior.

“People with epilepsy (PWE) are at a significantly higher risk of experiencing mental health difficulties, compared with healthy controls and individuals with other [long-term conditions] such as asthma and diabetes,” according to Rachel Batchelor, MSc, and Michelle D. Taylor, PhD, of the University of London (England) in Surrey.

Young adulthood, which encompasses people aged 18-25 years, has been identified as “a peak age of onset for anxiety and depression,” but mental health in young adults with epilepsy in particular has not been well studied, they wrote.

In the study, Ms. Batchelor and Dr. Taylor reviewed results of an online survey of 144 young adults with epilepsy aged 18-25 years. The survey measured current mental health symptoms, including anxiety, depression, and suicidality, as well as sociodemographic and epilepsy-related factors, coping strategies, and social support (Epilepsy Behav. 2021 May;118:107911. doi: 10.1016/j.yebeh.2021.107911).

The average age of the respondents was 21.6 years, 61% were female, and 88% were of White British ethnicity. A total of 88 participants were single, 48 were in a relationship, and 8 were married or engaged. About one-third (38%) worked full-time, and 28.5% were full-time university students, 18.8% worked part-time, and 8.3% were unemployed and not students. The average age of seizure onset was 12.4 years.

Overall, 116 (80.6%) of the survey respondents met the criteria for anxiety, 110 (76.4%) for depression, and 51 (35.4%) for suicidality.

Ratings of all three of these conditions were significantly higher in females, compared with males, the researchers noted. Anxiety, depression, and suicidality also were rated higher for individuals who waited more than 1 year vs. less than 1 year for an epilepsy diagnosis from the time of seizure onset, for those suffering from anti-seizure medication side effects vs. no side effects, and for those with comorbid conditions vs. no comorbid conditions.

Avoidant-focused coping strategies were positively correlated with anxiety, depression, and suicidality, while problem-focused coping and meaning-focused coping were negatively correlated, the researchers said. In addition, those who reported greater levels of support from friends had lower rates of anxiety and depression, and those who reported greater levels of support from family had lower rates of suicidality.

The study findings were limited by several factors, including the relatively homogenous population, and the absence of data on current anxiety and depression medications and additional professional support, the researchers noted.

However, the results extend the research on mental health in people with epilepsy, and the study is the first known to focus on the young adult population with epilepsy, they said.

“The high rates of anxiety, depression, and suicidality underscore the need for better integration of mental health provision into epilepsy care,” the researchers wrote. “While it would be premature to base recommendations for treating anxiety, depression, and suicidality in YAWE on the current study, investigating the efficacy of psychological interventions (for example, [acceptance and commitment therapy], [compassion-focused therapy], peer support, and family-based [therapy]) designed to address the psychosocial variables shown to independently predict mental health outcomes in YAWE would be worthy future research avenues,” they concluded.

The study received no outside funding, and the researchers disclosed no financial conflicts.

Young adults with epilepsy experience higher rates of anxiety, depression, and suicidality, compared with their counterparts in the general population, a new study shows.

The findings, based on a study of 144 young adults with epilepsy (YAWE), was published recently in Epilepsy & Behavior.

“People with epilepsy (PWE) are at a significantly higher risk of experiencing mental health difficulties, compared with healthy controls and individuals with other [long-term conditions] such as asthma and diabetes,” according to Rachel Batchelor, MSc, and Michelle D. Taylor, PhD, of the University of London (England) in Surrey.

Young adulthood, which encompasses people aged 18-25 years, has been identified as “a peak age of onset for anxiety and depression,” but mental health in young adults with epilepsy in particular has not been well studied, they wrote.

In the study, Ms. Batchelor and Dr. Taylor reviewed results of an online survey of 144 young adults with epilepsy aged 18-25 years. The survey measured current mental health symptoms, including anxiety, depression, and suicidality, as well as sociodemographic and epilepsy-related factors, coping strategies, and social support (Epilepsy Behav. 2021 May;118:107911. doi: 10.1016/j.yebeh.2021.107911).

The average age of the respondents was 21.6 years, 61% were female, and 88% were of White British ethnicity. A total of 88 participants were single, 48 were in a relationship, and 8 were married or engaged. About one-third (38%) worked full-time, and 28.5% were full-time university students, 18.8% worked part-time, and 8.3% were unemployed and not students. The average age of seizure onset was 12.4 years.

Overall, 116 (80.6%) of the survey respondents met the criteria for anxiety, 110 (76.4%) for depression, and 51 (35.4%) for suicidality.

Ratings of all three of these conditions were significantly higher in females, compared with males, the researchers noted. Anxiety, depression, and suicidality also were rated higher for individuals who waited more than 1 year vs. less than 1 year for an epilepsy diagnosis from the time of seizure onset, for those suffering from anti-seizure medication side effects vs. no side effects, and for those with comorbid conditions vs. no comorbid conditions.

Avoidant-focused coping strategies were positively correlated with anxiety, depression, and suicidality, while problem-focused coping and meaning-focused coping were negatively correlated, the researchers said. In addition, those who reported greater levels of support from friends had lower rates of anxiety and depression, and those who reported greater levels of support from family had lower rates of suicidality.

The study findings were limited by several factors, including the relatively homogenous population, and the absence of data on current anxiety and depression medications and additional professional support, the researchers noted.

However, the results extend the research on mental health in people with epilepsy, and the study is the first known to focus on the young adult population with epilepsy, they said.

“The high rates of anxiety, depression, and suicidality underscore the need for better integration of mental health provision into epilepsy care,” the researchers wrote. “While it would be premature to base recommendations for treating anxiety, depression, and suicidality in YAWE on the current study, investigating the efficacy of psychological interventions (for example, [acceptance and commitment therapy], [compassion-focused therapy], peer support, and family-based [therapy]) designed to address the psychosocial variables shown to independently predict mental health outcomes in YAWE would be worthy future research avenues,” they concluded.

The study received no outside funding, and the researchers disclosed no financial conflicts.

Depression and psychosis are significantly associated with neuronal loss and gliosis – but not with Lewy body scores – in Parkinson’s disease, data from analyses of the brains of 175 patients suggest.

ipopba/Getty Images

Previous research has suggested a link between neuronal loss and depression in Parkinson’s disease (PD) but the impact of Lewy bodies has not been well studied, Nicole Mercado Fischer, MPH, of Johns Hopkins University, Baltimore, and colleagues wrote.

Evaluating Lewy body scores and neuronal loss/gliosis in the substantia nigra pars compacta (SN) and locus coeruleus (LC) could increase understanding of pathophysiology in PD, they said.

In a study published in the American Journal of Geriatric Psychiatry, the researchers analyzed the brains of 175 individuals with a primary diagnosis of PD.

A total of 98 participants had diagnoses of psychosis, 88 had depression, and 55 had anxiety. The average age of onset for PD was 62.4 years; 67.4% of the subjects were male, and 97.8% were White. The mean duration of illness was 16 years, and the average age at death was 78 years.

Psychosis was significantly associated with severe neuronal loss and gliosis in both the LC and SN (P = .048 and P = .042, respectively). Depression was significantly associated with severe neuronal loss in the SN (P = .042) but not in the LC. Anxiety was not associated with severe neuronal loss in either brain region. These results remained significant after a multivariate analysis, the researchers noted. However, Lewy body scores were not associated with any neuropsychiatric symptom, and severity of neuronal loss and gliosis was not correlated with Lewy body scores.

The study findings were limited by several factors, including the retrospective design and inability to collect pathology data for all patients, the researchers noted. Also, in some cases, the collection of clinical data and observation of brain tissue pathology took place years apart, and the researchers did not assess medication records.

However, the results were strengthened by the large sample size and “further support the notion that in vivo clinical symptoms of PD are either not caused by Lewy body pathology or that the relationship is confounded by the time of autopsy,” they said. Future directions for research include examining the underlying neuropsychiatric symptoms in PD “by looking at pathology in functional subregions and eventually by using new functional imaging techniques in vivo.”

The researchers had no financial conflicts to disclose. Two coauthors were supported in part by the National Institutes of Health.

Depression and psychosis are significantly associated with neuronal loss and gliosis – but not with Lewy body scores – in Parkinson’s disease, data from analyses of the brains of 175 patients suggest.

ipopba/Getty Images

Previous research has suggested a link between neuronal loss and depression in Parkinson’s disease (PD) but the impact of Lewy bodies has not been well studied, Nicole Mercado Fischer, MPH, of Johns Hopkins University, Baltimore, and colleagues wrote.

Evaluating Lewy body scores and neuronal loss/gliosis in the substantia nigra pars compacta (SN) and locus coeruleus (LC) could increase understanding of pathophysiology in PD, they said.

In a study published in the American Journal of Geriatric Psychiatry, the researchers analyzed the brains of 175 individuals with a primary diagnosis of PD.

A total of 98 participants had diagnoses of psychosis, 88 had depression, and 55 had anxiety. The average age of onset for PD was 62.4 years; 67.4% of the subjects were male, and 97.8% were White. The mean duration of illness was 16 years, and the average age at death was 78 years.

Psychosis was significantly associated with severe neuronal loss and gliosis in both the LC and SN (P = .048 and P = .042, respectively). Depression was significantly associated with severe neuronal loss in the SN (P = .042) but not in the LC. Anxiety was not associated with severe neuronal loss in either brain region. These results remained significant after a multivariate analysis, the researchers noted. However, Lewy body scores were not associated with any neuropsychiatric symptom, and severity of neuronal loss and gliosis was not correlated with Lewy body scores.

The study findings were limited by several factors, including the retrospective design and inability to collect pathology data for all patients, the researchers noted. Also, in some cases, the collection of clinical data and observation of brain tissue pathology took place years apart, and the researchers did not assess medication records.

However, the results were strengthened by the large sample size and “further support the notion that in vivo clinical symptoms of PD are either not caused by Lewy body pathology or that the relationship is confounded by the time of autopsy,” they said. Future directions for research include examining the underlying neuropsychiatric symptoms in PD “by looking at pathology in functional subregions and eventually by using new functional imaging techniques in vivo.”

The researchers had no financial conflicts to disclose. Two coauthors were supported in part by the National Institutes of Health.

Depression and psychosis are significantly associated with neuronal loss and gliosis – but not with Lewy body scores – in Parkinson’s disease, data from analyses of the brains of 175 patients suggest.

ipopba/Getty Images

Previous research has suggested a link between neuronal loss and depression in Parkinson’s disease (PD) but the impact of Lewy bodies has not been well studied, Nicole Mercado Fischer, MPH, of Johns Hopkins University, Baltimore, and colleagues wrote.

Evaluating Lewy body scores and neuronal loss/gliosis in the substantia nigra pars compacta (SN) and locus coeruleus (LC) could increase understanding of pathophysiology in PD, they said.

In a study published in the American Journal of Geriatric Psychiatry, the researchers analyzed the brains of 175 individuals with a primary diagnosis of PD.

A total of 98 participants had diagnoses of psychosis, 88 had depression, and 55 had anxiety. The average age of onset for PD was 62.4 years; 67.4% of the subjects were male, and 97.8% were White. The mean duration of illness was 16 years, and the average age at death was 78 years.

Psychosis was significantly associated with severe neuronal loss and gliosis in both the LC and SN (P = .048 and P = .042, respectively). Depression was significantly associated with severe neuronal loss in the SN (P = .042) but not in the LC. Anxiety was not associated with severe neuronal loss in either brain region. These results remained significant after a multivariate analysis, the researchers noted. However, Lewy body scores were not associated with any neuropsychiatric symptom, and severity of neuronal loss and gliosis was not correlated with Lewy body scores.

The study findings were limited by several factors, including the retrospective design and inability to collect pathology data for all patients, the researchers noted. Also, in some cases, the collection of clinical data and observation of brain tissue pathology took place years apart, and the researchers did not assess medication records.

However, the results were strengthened by the large sample size and “further support the notion that in vivo clinical symptoms of PD are either not caused by Lewy body pathology or that the relationship is confounded by the time of autopsy,” they said. Future directions for research include examining the underlying neuropsychiatric symptoms in PD “by looking at pathology in functional subregions and eventually by using new functional imaging techniques in vivo.”

The researchers had no financial conflicts to disclose. Two coauthors were supported in part by the National Institutes of Health.

Adults with cerebral palsy, especially those with intellectual disabilities, are significantly more likely to be diagnosed with a psychiatric disorder, compared with the general population, a review of seven datasets shows.

The body of literature on psychiatric issues in children with cerebral palsy (CP) is increasing, but population-based studies of psychiatric issues in adults with CP have been limited in number and in scope. Most of those studies focus mainly on anxiety and depression, rather than on other issues such as psychosis or schizophrenia, Carly A. McMorris, PhD, of the University of Calgary (Alta.) and colleagues wrote.

In a retrospective, cross-sectional study published in Research in Developmental Disabilities, the researchers reviewed information from five health data sets, one registry, and census data for adults aged 18-64 years with a CP diagnosis living in Ontario, including those with and without diagnosed intellectual disabilities (ID) and a comparison group of individuals in the general population. The researchers examined the proportion of individuals with a psychiatric disorder in each of four groups: total CP, CP without ID, CP with ID, and the general population.

The study participants included 9,388 individuals with CP, 4,767 individuals with CP and ID, and a general population of 2,757,744 individuals. About half of the participants were male, and at least 85% lived in urban areas.

Overall, the total CP group was 1.4 times more likely to receive any psychiatric diagnosis, compared with the general population group, over a 2-year period (33.7 % vs. 24.7%). Also, the CP group was more than twice as likely to be diagnosed with a psychotic disorder, schizophrenia, personality disorder, or bipolar disorder, compared with the general population. Individuals with CP were significantly more likely to suffer from mood or affective disorders, and depression and anxiety disorders, compared with the general population, but less likely to suffer from substance use disorders.

When the data were assessed by ID status, disorders such as psychotic disorders, bipolar disorders, and schizophrenia were six times more common among individuals with CP and ID, compared with the general population (adjusted prevalence ratios, 6.26 and 6.46, respectively).

Individuals with CP and ID also had a notably higher prevalence of bipolar disorder (confidence interval, 2.06-2.89) and personality disorder, compared with the general population (aPR, 2.44 and 4.22, respectively), but this subgroup also was less likely than the general population to engage in substance use (aPR, 0.44).

The study findings were limited by several factors, including the absence of universal definitions for some of the conditions studied, potential misclassification of ID, the inclusion of data on specific psychiatric diagnoses but not elevated symptoms, and by the challenges of diagnosing psychiatric disorders in individuals with ID, the researchers noted.

However, “the present study contributes important information to the existing literature, highlighting that psychiatric issues are common in adults with CP, similar to what has been reported in children and youth,” they said. “Further research is needed to determine the validity and reliability of mental health assessment measures for this population, the efficacy of evidence-based psychotherapeutic approaches ... and the underlying causes or mechanisms of psychiatric issues in individuals with CP.”

The findings also highlight the need for health care clinicians to screen for psychiatric issues in CP patients, they said.

The study was supported in part by the Province of Ontario research grants and the Institute for Clinical Evaluative Sciences, funded by an annual grant from the Ontario Ministry of Health and Long-Term Care. The researchers had no disclosures.

Adults with cerebral palsy, especially those with intellectual disabilities, are significantly more likely to be diagnosed with a psychiatric disorder, compared with the general population, a review of seven datasets shows.

The body of literature on psychiatric issues in children with cerebral palsy (CP) is increasing, but population-based studies of psychiatric issues in adults with CP have been limited in number and in scope. Most of those studies focus mainly on anxiety and depression, rather than on other issues such as psychosis or schizophrenia, Carly A. McMorris, PhD, of the University of Calgary (Alta.) and colleagues wrote.

In a retrospective, cross-sectional study published in Research in Developmental Disabilities, the researchers reviewed information from five health data sets, one registry, and census data for adults aged 18-64 years with a CP diagnosis living in Ontario, including those with and without diagnosed intellectual disabilities (ID) and a comparison group of individuals in the general population. The researchers examined the proportion of individuals with a psychiatric disorder in each of four groups: total CP, CP without ID, CP with ID, and the general population.

The study participants included 9,388 individuals with CP, 4,767 individuals with CP and ID, and a general population of 2,757,744 individuals. About half of the participants were male, and at least 85% lived in urban areas.

Overall, the total CP group was 1.4 times more likely to receive any psychiatric diagnosis, compared with the general population group, over a 2-year period (33.7 % vs. 24.7%). Also, the CP group was more than twice as likely to be diagnosed with a psychotic disorder, schizophrenia, personality disorder, or bipolar disorder, compared with the general population. Individuals with CP were significantly more likely to suffer from mood or affective disorders, and depression and anxiety disorders, compared with the general population, but less likely to suffer from substance use disorders.

When the data were assessed by ID status, disorders such as psychotic disorders, bipolar disorders, and schizophrenia were six times more common among individuals with CP and ID, compared with the general population (adjusted prevalence ratios, 6.26 and 6.46, respectively).

Individuals with CP and ID also had a notably higher prevalence of bipolar disorder (confidence interval, 2.06-2.89) and personality disorder, compared with the general population (aPR, 2.44 and 4.22, respectively), but this subgroup also was less likely than the general population to engage in substance use (aPR, 0.44).

The study findings were limited by several factors, including the absence of universal definitions for some of the conditions studied, potential misclassification of ID, the inclusion of data on specific psychiatric diagnoses but not elevated symptoms, and by the challenges of diagnosing psychiatric disorders in individuals with ID, the researchers noted.

However, “the present study contributes important information to the existing literature, highlighting that psychiatric issues are common in adults with CP, similar to what has been reported in children and youth,” they said. “Further research is needed to determine the validity and reliability of mental health assessment measures for this population, the efficacy of evidence-based psychotherapeutic approaches ... and the underlying causes or mechanisms of psychiatric issues in individuals with CP.”

The findings also highlight the need for health care clinicians to screen for psychiatric issues in CP patients, they said.

The study was supported in part by the Province of Ontario research grants and the Institute for Clinical Evaluative Sciences, funded by an annual grant from the Ontario Ministry of Health and Long-Term Care. The researchers had no disclosures.

Adults with cerebral palsy, especially those with intellectual disabilities, are significantly more likely to be diagnosed with a psychiatric disorder, compared with the general population, a review of seven datasets shows.

The body of literature on psychiatric issues in children with cerebral palsy (CP) is increasing, but population-based studies of psychiatric issues in adults with CP have been limited in number and in scope. Most of those studies focus mainly on anxiety and depression, rather than on other issues such as psychosis or schizophrenia, Carly A. McMorris, PhD, of the University of Calgary (Alta.) and colleagues wrote.

In a retrospective, cross-sectional study published in Research in Developmental Disabilities, the researchers reviewed information from five health data sets, one registry, and census data for adults aged 18-64 years with a CP diagnosis living in Ontario, including those with and without diagnosed intellectual disabilities (ID) and a comparison group of individuals in the general population. The researchers examined the proportion of individuals with a psychiatric disorder in each of four groups: total CP, CP without ID, CP with ID, and the general population.

The study participants included 9,388 individuals with CP, 4,767 individuals with CP and ID, and a general population of 2,757,744 individuals. About half of the participants were male, and at least 85% lived in urban areas.

Overall, the total CP group was 1.4 times more likely to receive any psychiatric diagnosis, compared with the general population group, over a 2-year period (33.7 % vs. 24.7%). Also, the CP group was more than twice as likely to be diagnosed with a psychotic disorder, schizophrenia, personality disorder, or bipolar disorder, compared with the general population. Individuals with CP were significantly more likely to suffer from mood or affective disorders, and depression and anxiety disorders, compared with the general population, but less likely to suffer from substance use disorders.

When the data were assessed by ID status, disorders such as psychotic disorders, bipolar disorders, and schizophrenia were six times more common among individuals with CP and ID, compared with the general population (adjusted prevalence ratios, 6.26 and 6.46, respectively).

Individuals with CP and ID also had a notably higher prevalence of bipolar disorder (confidence interval, 2.06-2.89) and personality disorder, compared with the general population (aPR, 2.44 and 4.22, respectively), but this subgroup also was less likely than the general population to engage in substance use (aPR, 0.44).

The study findings were limited by several factors, including the absence of universal definitions for some of the conditions studied, potential misclassification of ID, the inclusion of data on specific psychiatric diagnoses but not elevated symptoms, and by the challenges of diagnosing psychiatric disorders in individuals with ID, the researchers noted.

However, “the present study contributes important information to the existing literature, highlighting that psychiatric issues are common in adults with CP, similar to what has been reported in children and youth,” they said. “Further research is needed to determine the validity and reliability of mental health assessment measures for this population, the efficacy of evidence-based psychotherapeutic approaches ... and the underlying causes or mechanisms of psychiatric issues in individuals with CP.”

The findings also highlight the need for health care clinicians to screen for psychiatric issues in CP patients, they said.

The study was supported in part by the Province of Ontario research grants and the Institute for Clinical Evaluative Sciences, funded by an annual grant from the Ontario Ministry of Health and Long-Term Care. The researchers had no disclosures.

Motor problems in children may be a harbinger of serious mental illness, new research suggests.

Investigators found that motor abnormalities were twice as common among those who develop psychosis or depression, compared with their counterparts in the general population, suggesting that these abnormalities may help predict vulnerability and provide an opportunity for early intervention.

“We have learned there are motor signs that are measurable in adolescence [that are] more prevalent in these disorders,” said lead investigator Katherine S. F. Damme, PhD, adolescent development and preventive treatment program (ADAPT), Northwestern University, Chicago. 

A core symptom

There has been a lot of interest in the pathophysiology of psychosis and in detecting it early, said Dr. Damme. “It has devastating effects, and early intervention is of great importance,” she added.

However, previous research has typically focused on affect or cognition, rather than on motor signs, despite the fact that motor signs are a “core symptom of both psychosis and depression.”

The prevalence and presentation of motor signs in adolescence, which is a “critical time for identifying these risk markers” because of their proximity to the onset of psychosis, has been understudied, Dr. Damme said.

For their study, the investigators gathered motor function data from the Adolescent Brain Cognitive Development Study (ABCD), which included 10,835 children aged 9-11 years with broad demographic diversity from 21 sites across the United States.

Overall, 27.6% of the children were reported to have least one motor sign; approximately 3% were reported to have two or more motor signs.

The most common of these was dyscoordination, which was endorsed by 19.3% of participants. In addition, 8.8% were reported to have had experienced developmental motor delays, 1.5% had psychomotor agitation, and 0.3% had psychomotor retardation.

The investigators determined that 4.6% of participants met criteria for depression, 2.6% for a psychosis, and 1.8% for comorbid psychosis and depression.

Motor signs were much more common among children with depression, psychosis, or both than among those who did not have these conditions; 45.8% reported having at least one motor sign.

Developmental motor delays and dyscoordination occurred at about the same rate in both patients with depression and those with psychosis. Rates were higher among patients with both of these conditions than among those with either condition alone.

In contrast, psychomotor agitation was more common among patients with depression alone and among those with comorbid depression and psychosis than among patients with psychosis alone. The rate of psychomotor retardation was increased among patients with psychosis alone but was less common among patients with comorbidity than in the healthy control group.

Familial vulnerability

The investigators also assessed participants who had not been diagnosed with a mental illness but who had a family history of depression only (28.9%), a relative with psychosis-like experiences (0.6%), or a family history of both depression and psychosis experiences (1.8%).

Although the effect size was smaller, there was a higher rate of motor signs among participants with a family history of these conditions, Dr. Damme said. “Again, we see that it’s elevated across developmental motor delays and at a similar rate in people who have depression and psychosis.”

In addition, psychomotor agitation was linked to depression with psychosis and depression without it.

Sensorimotor connectivity network data for the cohort indicated there was no main effect of diagnosis on corticostriatal connectivity.

However, more depressive symptoms were related to less connectivity (P = .024). There was a similar finding for psychotic-like experiences. The total number of such experiences related to lower connectivity (P < .001).

During the postpresentation discussion, Ian Kelleher, MD, PhD, honorary clinical lecturer in psychiatry at the Royal College of Surgeons in Ireland, Dublin, said he was “surprised” by the finding that the rate of psychomotor retardation was lower among participants with psychosis and depression.

Dr. Damme noted that some of the motor sign item ratings came by way of a child interview and that some of these item ratings came from the adults in the children’s lives.

She added that she was not entirely sure whether asking an 8- to 11-year-old in a clinical interview whether they are experiencing motor signs “might be the best way to get at motor slowing.”

Subtle features

Commenting on the findings in an interview, Peter F. Liddle, MD, PhD, professor of psychiatry, at the University of Nottingham (England), noted that the “features we’re talking about are pretty subtle.

“What I’ve been wondering about for some time is whether we should be getting video recordings and using machine learning approaches to teach a computer to recognize normal movements vs abnormal movements, and particularly facial expression,” said Dr. Liddle, who was not involved with the research.

He called the current study “interesting” but noted several factors that affect the potential utility of the findings in predicting outcomes.

First, they “may not be very good for distinguishing schizophrenia from mood disorders; but if the question is simply determining which young person might go on to develop a significant mental disorder, then it may be useful,” Dr. Liddle said.

He endorsed the investigators’ conclusion that motor abnormalities may be a transdiagnostic marker. Beyond that, they may be “more useful as a predictor of the likely long-term severity, but that’s my own hypothesis based on my work,” he added.

Another question concerns the sensitivity of motor abnormalities as a predictive marker. With the rate of the abnormalities identified in those who developed psychosis and depression about double the rate in the overall population, “it sounds like those assessors were fairly sensitive. … but not all that specific,” said Dr. Liddle.

A third issue relates to treatment. “By the time people get sent to a psychiatrist for assessment for possible impending psychotic illness, they’ve often already had medication,” typically an antidepressant or antipsychotic.

“It’s very well established that dopamine-blocking antipsychotics produce hypokinesia and also dyskinesia,” which could then become a confounding factor, Dr. Liddle said.

The study was funded by grants from the National Institute of Mental Health. The study authors and Dr. Liddle have disclosed no relevant financial relationships.

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

Motor problems in children may be a harbinger of serious mental illness, new research suggests.

Investigators found that motor abnormalities were twice as common among those who develop psychosis or depression, compared with their counterparts in the general population, suggesting that these abnormalities may help predict vulnerability and provide an opportunity for early intervention.

“We have learned there are motor signs that are measurable in adolescence [that are] more prevalent in these disorders,” said lead investigator Katherine S. F. Damme, PhD, adolescent development and preventive treatment program (ADAPT), Northwestern University, Chicago. 

A core symptom

There has been a lot of interest in the pathophysiology of psychosis and in detecting it early, said Dr. Damme. “It has devastating effects, and early intervention is of great importance,” she added.

However, previous research has typically focused on affect or cognition, rather than on motor signs, despite the fact that motor signs are a “core symptom of both psychosis and depression.”

The prevalence and presentation of motor signs in adolescence, which is a “critical time for identifying these risk markers” because of their proximity to the onset of psychosis, has been understudied, Dr. Damme said.

For their study, the investigators gathered motor function data from the Adolescent Brain Cognitive Development Study (ABCD), which included 10,835 children aged 9-11 years with broad demographic diversity from 21 sites across the United States.

Overall, 27.6% of the children were reported to have least one motor sign; approximately 3% were reported to have two or more motor signs.

The most common of these was dyscoordination, which was endorsed by 19.3% of participants. In addition, 8.8% were reported to have had experienced developmental motor delays, 1.5% had psychomotor agitation, and 0.3% had psychomotor retardation.

The investigators determined that 4.6% of participants met criteria for depression, 2.6% for a psychosis, and 1.8% for comorbid psychosis and depression.

Motor signs were much more common among children with depression, psychosis, or both than among those who did not have these conditions; 45.8% reported having at least one motor sign.

Developmental motor delays and dyscoordination occurred at about the same rate in both patients with depression and those with psychosis. Rates were higher among patients with both of these conditions than among those with either condition alone.

In contrast, psychomotor agitation was more common among patients with depression alone and among those with comorbid depression and psychosis than among patients with psychosis alone. The rate of psychomotor retardation was increased among patients with psychosis alone but was less common among patients with comorbidity than in the healthy control group.

Familial vulnerability

The investigators also assessed participants who had not been diagnosed with a mental illness but who had a family history of depression only (28.9%), a relative with psychosis-like experiences (0.6%), or a family history of both depression and psychosis experiences (1.8%).

Although the effect size was smaller, there was a higher rate of motor signs among participants with a family history of these conditions, Dr. Damme said. “Again, we see that it’s elevated across developmental motor delays and at a similar rate in people who have depression and psychosis.”

In addition, psychomotor agitation was linked to depression with psychosis and depression without it.

Sensorimotor connectivity network data for the cohort indicated there was no main effect of diagnosis on corticostriatal connectivity.

However, more depressive symptoms were related to less connectivity (P = .024). There was a similar finding for psychotic-like experiences. The total number of such experiences related to lower connectivity (P < .001).

During the postpresentation discussion, Ian Kelleher, MD, PhD, honorary clinical lecturer in psychiatry at the Royal College of Surgeons in Ireland, Dublin, said he was “surprised” by the finding that the rate of psychomotor retardation was lower among participants with psychosis and depression.

Dr. Damme noted that some of the motor sign item ratings came by way of a child interview and that some of these item ratings came from the adults in the children’s lives.

She added that she was not entirely sure whether asking an 8- to 11-year-old in a clinical interview whether they are experiencing motor signs “might be the best way to get at motor slowing.”

Subtle features

Commenting on the findings in an interview, Peter F. Liddle, MD, PhD, professor of psychiatry, at the University of Nottingham (England), noted that the “features we’re talking about are pretty subtle.

“What I’ve been wondering about for some time is whether we should be getting video recordings and using machine learning approaches to teach a computer to recognize normal movements vs abnormal movements, and particularly facial expression,” said Dr. Liddle, who was not involved with the research.

He called the current study “interesting” but noted several factors that affect the potential utility of the findings in predicting outcomes.

First, they “may not be very good for distinguishing schizophrenia from mood disorders; but if the question is simply determining which young person might go on to develop a significant mental disorder, then it may be useful,” Dr. Liddle said.

He endorsed the investigators’ conclusion that motor abnormalities may be a transdiagnostic marker. Beyond that, they may be “more useful as a predictor of the likely long-term severity, but that’s my own hypothesis based on my work,” he added.

Another question concerns the sensitivity of motor abnormalities as a predictive marker. With the rate of the abnormalities identified in those who developed psychosis and depression about double the rate in the overall population, “it sounds like those assessors were fairly sensitive. … but not all that specific,” said Dr. Liddle.

A third issue relates to treatment. “By the time people get sent to a psychiatrist for assessment for possible impending psychotic illness, they’ve often already had medication,” typically an antidepressant or antipsychotic.

“It’s very well established that dopamine-blocking antipsychotics produce hypokinesia and also dyskinesia,” which could then become a confounding factor, Dr. Liddle said.

The study was funded by grants from the National Institute of Mental Health. The study authors and Dr. Liddle have disclosed no relevant financial relationships.

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

Motor problems in children may be a harbinger of serious mental illness, new research suggests.

Investigators found that motor abnormalities were twice as common among those who develop psychosis or depression, compared with their counterparts in the general population, suggesting that these abnormalities may help predict vulnerability and provide an opportunity for early intervention.

“We have learned there are motor signs that are measurable in adolescence [that are] more prevalent in these disorders,” said lead investigator Katherine S. F. Damme, PhD, adolescent development and preventive treatment program (ADAPT), Northwestern University, Chicago. 

A core symptom

There has been a lot of interest in the pathophysiology of psychosis and in detecting it early, said Dr. Damme. “It has devastating effects, and early intervention is of great importance,” she added.

However, previous research has typically focused on affect or cognition, rather than on motor signs, despite the fact that motor signs are a “core symptom of both psychosis and depression.”

The prevalence and presentation of motor signs in adolescence, which is a “critical time for identifying these risk markers” because of their proximity to the onset of psychosis, has been understudied, Dr. Damme said.

For their study, the investigators gathered motor function data from the Adolescent Brain Cognitive Development Study (ABCD), which included 10,835 children aged 9-11 years with broad demographic diversity from 21 sites across the United States.

Overall, 27.6% of the children were reported to have least one motor sign; approximately 3% were reported to have two or more motor signs.

The most common of these was dyscoordination, which was endorsed by 19.3% of participants. In addition, 8.8% were reported to have had experienced developmental motor delays, 1.5% had psychomotor agitation, and 0.3% had psychomotor retardation.

The investigators determined that 4.6% of participants met criteria for depression, 2.6% for a psychosis, and 1.8% for comorbid psychosis and depression.

Motor signs were much more common among children with depression, psychosis, or both than among those who did not have these conditions; 45.8% reported having at least one motor sign.

Developmental motor delays and dyscoordination occurred at about the same rate in both patients with depression and those with psychosis. Rates were higher among patients with both of these conditions than among those with either condition alone.

In contrast, psychomotor agitation was more common among patients with depression alone and among those with comorbid depression and psychosis than among patients with psychosis alone. The rate of psychomotor retardation was increased among patients with psychosis alone but was less common among patients with comorbidity than in the healthy control group.

Familial vulnerability

The investigators also assessed participants who had not been diagnosed with a mental illness but who had a family history of depression only (28.9%), a relative with psychosis-like experiences (0.6%), or a family history of both depression and psychosis experiences (1.8%).

Although the effect size was smaller, there was a higher rate of motor signs among participants with a family history of these conditions, Dr. Damme said. “Again, we see that it’s elevated across developmental motor delays and at a similar rate in people who have depression and psychosis.”

In addition, psychomotor agitation was linked to depression with psychosis and depression without it.

Sensorimotor connectivity network data for the cohort indicated there was no main effect of diagnosis on corticostriatal connectivity.

However, more depressive symptoms were related to less connectivity (P = .024). There was a similar finding for psychotic-like experiences. The total number of such experiences related to lower connectivity (P < .001).

During the postpresentation discussion, Ian Kelleher, MD, PhD, honorary clinical lecturer in psychiatry at the Royal College of Surgeons in Ireland, Dublin, said he was “surprised” by the finding that the rate of psychomotor retardation was lower among participants with psychosis and depression.

Dr. Damme noted that some of the motor sign item ratings came by way of a child interview and that some of these item ratings came from the adults in the children’s lives.

She added that she was not entirely sure whether asking an 8- to 11-year-old in a clinical interview whether they are experiencing motor signs “might be the best way to get at motor slowing.”

Subtle features

Commenting on the findings in an interview, Peter F. Liddle, MD, PhD, professor of psychiatry, at the University of Nottingham (England), noted that the “features we’re talking about are pretty subtle.

“What I’ve been wondering about for some time is whether we should be getting video recordings and using machine learning approaches to teach a computer to recognize normal movements vs abnormal movements, and particularly facial expression,” said Dr. Liddle, who was not involved with the research.

He called the current study “interesting” but noted several factors that affect the potential utility of the findings in predicting outcomes.

First, they “may not be very good for distinguishing schizophrenia from mood disorders; but if the question is simply determining which young person might go on to develop a significant mental disorder, then it may be useful,” Dr. Liddle said.

He endorsed the investigators’ conclusion that motor abnormalities may be a transdiagnostic marker. Beyond that, they may be “more useful as a predictor of the likely long-term severity, but that’s my own hypothesis based on my work,” he added.

Another question concerns the sensitivity of motor abnormalities as a predictive marker. With the rate of the abnormalities identified in those who developed psychosis and depression about double the rate in the overall population, “it sounds like those assessors were fairly sensitive. … but not all that specific,” said Dr. Liddle.

A third issue relates to treatment. “By the time people get sent to a psychiatrist for assessment for possible impending psychotic illness, they’ve often already had medication,” typically an antidepressant or antipsychotic.

“It’s very well established that dopamine-blocking antipsychotics produce hypokinesia and also dyskinesia,” which could then become a confounding factor, Dr. Liddle said.

The study was funded by grants from the National Institute of Mental Health. The study authors and Dr. Liddle have disclosed no relevant financial relationships.

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

Deep brain stimulation (DBS) significantly improves motor function in patients with Parkinson’s disease over the long term, regardless of the therapeutic target, new research shows. In the longest follow-up study comparing the subthalamic nucleus (STN) or the globus pallidus (GPi) as treatment targets for Parkinson’s disease, investigators found DBS was effective at 10 years regardless of which of these two brain regions were treated.

“Both STN and GPi DBS maintained motor benefit out to 10 years, with improvements seen in tremor and rigidity, greater than bradykinesia,” said study author Jill L. Ostrem, MD, medical director and division chief at the University of California, San Francisco Movement Disorders and Neuromodulation Center.

“Less medication was required, and patients had fewer motor fluctuations and less dyskinesia,” she added. But nonmotor symptoms and other symptoms that are less responsive to DBS progress led to worsening disability over time.

The findings were presented at the American Academy of Neurology’s 2021 annual meeting.
 

Advanced patients  

Many studies have examined the GPi and STN as targets for deep brain stimulation in Parkinson’s disease. Some research has compared outcomes between the two targets, but no prospective, randomized trials have evaluated outcomes beyond 3 years of treatment.

For the study, investigators examined data from Study 468, a multicenter, randomized, controlled trial conducted by the U.S. Veterans Affairs (VA) Cooperative Study Program and the National Institute of Neurological Disorders and Stroke (NINDS). In this study, a subset of patients who had been randomly assigned to deep brain stimulation of the GPi or STN were followed for up to 10 years.

Participants were examined at 2 years, 7 years, and 10 years. Eighty-five participants assigned to GPi and 70 assigned to STN completed the visit at 2 years. At 7 years, 68 GPi patients and 49 STN patients completed the visit. Forty-nine patients assigned to GPi and 28 assigned to STN completed the visit at 10 years.

The study’s primary outcome was change in the Unified Parkinson Disease Rating Scale (UPDRS) motor subscale score while off medication and on stimulation between targets. Secondary outcomes included tremor, rigidity, and bradykinesia.

The two groups of patients had comparable baseline characteristics. Mean age was approximately 59 years in both groups. The proportion of male patients was 87% in the GPi group and 83% in the STN group. White patients predominated in the GPi (98%) and STN (94%) groups.

Average disease duration was approximately 11 years, and more than 10% of patients in each group were older than 70 years, indicating a “somewhat more advanced patient cohort,” said Dr. Ostrem.

Although the study’s dropout rate was high, the researchers found no difference in baseline characteristics between patients who did and did not complete the study.
 

Consistent motor improvement

Motor function improved at all timepoints for patients in both study arms. Baseline UPDRS motor subscale score was 43.2 for patients assigned to GPi stimulation. This score changed to 25.8 at 2 years (P < .001), 35.4 at 7 years (P < .001), and 34.0 at 10 years (P = .10).

Baseline UPDRS motor subscale score also was 43.2 for patients assigned to STN stimulation. This score changed to 27.7 at 2 years (P < .001), 34.4 at 7 years (P < .001), and 28.3 at 10 years (P < .001). Improvements were similar between groups but tended to be greater in the STN group.

Among the study’s secondary outcomes, tremor subscales showed the greatest improvement over time, followed by rigidity subscores. Compared with GPi DBS, STN DBS was associated with greater improvement in bradykinesia subscores at 7 and 10 years (P = .03).

In addition, UPDRS I, II, and IV scores, as recorded in motor diaries, showed significant long-term improvement in both study groups. Part I (which reflects mentation and mood) and part II (which reflects activities of daily living) tended to worsen at 7 and 10 years. There were no differences between groups.

Total score on the Parkinson’s Disease Questionnaire-39 (PDQ-39), which measures function in daily living, no longer showed improvement at 7 or 10 years for either target. Rather, it showed worsening, compared with baseline.

“Cognitive impairment and gait and balance issues result in more issues with quality of life and independence,” said Dr. Ostrem.

Stimulation of both targets reduced medication use significantly. There was no difference between targets for this outcome.

The rate of device-related complications in this cohort was comparatively low, said Dr. Ostrem. In the overall study complication, the rate of DBS malfunction was 7.7%, and the rate of DBS infection was 5.8%.

The finding that both targets had similar long-term sustainability of motor benefit provides reassurance that either target is a reasonable choice, said Dr. Ostrem. “I would suggest target choice be determined by a multidisciplinary team, where individual patient signs and symptoms and goals can be considered.”

Other large DBS trials with shorter follow-up durations have suggested differences between the targets. These data can guide the choice of target, said Dr. Ostrem.

“The field of DBS research has never been more exciting,” she added. Newer systems that include improved hardware and software and can record neurophysiologic data from the implanted brain leads could provide improved outcomes of DBS treatment. 

“With modern DBS methods and approaches, we are learning more about Parkinson’s disease and other brain diseases, which I believe will help us to find more treatments and other interventions to slow the progression or minimize symptoms,” Dr. Ostrem concluded.
 

Selection bias?

Commenting on the study, Alfonso Fasano, MD, PhD, chair in neuromodulation and multidisciplinary care at University of Toronto, noted that “these are the first long-term findings resulting from a randomized trial, overall supporting the early notion that STN DBS is superior to GPi DBS in terms of bradykinesia improvement, especially in the long-run.”

The findings reflect the clinical practice of considering STN deep brain stimulation for young patients who face a longer disease duration. Younger patients might tolerate the procedure better than older patients. They also may achieve medication reduction, better motor control, and the possibility of increasing medication when side effects make increased stimulation undesirable.

“It’s interesting to note that even GPi DBS maintained an overall good outcome over time,” said Dr. Fasano. This finding contrasts with that of previous studies, but the latter were limited by selection bias, he added. “Older and frail patients were more likely to be treated with GPi DBS.”

Two factors limit the study’s findings, said Dr. Fasano. During the long study duration, many patients dropped out or were lost to follow-up. “Thus, it is conceivable that the study only enrolled the best responders in each group,” said Dr. Fasano.

In addition, the results of the trial that the current investigators analyzed are not necessarily generalizable, as those who conducted it soon recognized. The study by the VA and NINDS did not detect differences between targets, mainly because of a surprisingly low effect of STN deep brain stimulation. The researchers determined that this finding was related to the study’s inclusion criteria.

“The lack of improvement [on the PDQ-39] clearly indicates that simply treating the motor problems of Parkinson’s disease patients is not enough,” said Dr. Fasano. It also emphasizes that DBS is a symptomatic therapy with little or no effect on the disease’s natural history.

“It will be also important to see how the new data reported by Dr. Ostrem compare to the long-term outcome of the other major STN versus GPi trial from Europe,” said Dr. Fasano, referring to the NSTAPS trial.

He added that it will also be interesting to follow these cohorts for at least 5 more years in order to identify possible differences in terms of disease milestones such as dementia and survival. Previous studies have shown a reduction in survival with targets other than STN, but this finding likely reflects selection bias, he concluded.

The study was funded by the National Institute of Neurological Disorders and Stroke and the U.S. Department of Veterans Affairs. Dr. Ostrem previously has accepted consulting funds from Medtronic and Abbott. She receives grant support from Medtronic and Boston Scientific for fellowship training and clinical trial support. These companies were not involved in the study. Dr. Fasano received honoraria and research support and honoraria from Abbott, Boston Scientific, Brainlab, Ceregate, Inbrain, and Medtronic.

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

Deep brain stimulation (DBS) significantly improves motor function in patients with Parkinson’s disease over the long term, regardless of the therapeutic target, new research shows. In the longest follow-up study comparing the subthalamic nucleus (STN) or the globus pallidus (GPi) as treatment targets for Parkinson’s disease, investigators found DBS was effective at 10 years regardless of which of these two brain regions were treated.

“Both STN and GPi DBS maintained motor benefit out to 10 years, with improvements seen in tremor and rigidity, greater than bradykinesia,” said study author Jill L. Ostrem, MD, medical director and division chief at the University of California, San Francisco Movement Disorders and Neuromodulation Center.

“Less medication was required, and patients had fewer motor fluctuations and less dyskinesia,” she added. But nonmotor symptoms and other symptoms that are less responsive to DBS progress led to worsening disability over time.

The findings were presented at the American Academy of Neurology’s 2021 annual meeting.
 

Advanced patients  

Many studies have examined the GPi and STN as targets for deep brain stimulation in Parkinson’s disease. Some research has compared outcomes between the two targets, but no prospective, randomized trials have evaluated outcomes beyond 3 years of treatment.

For the study, investigators examined data from Study 468, a multicenter, randomized, controlled trial conducted by the U.S. Veterans Affairs (VA) Cooperative Study Program and the National Institute of Neurological Disorders and Stroke (NINDS). In this study, a subset of patients who had been randomly assigned to deep brain stimulation of the GPi or STN were followed for up to 10 years.

Participants were examined at 2 years, 7 years, and 10 years. Eighty-five participants assigned to GPi and 70 assigned to STN completed the visit at 2 years. At 7 years, 68 GPi patients and 49 STN patients completed the visit. Forty-nine patients assigned to GPi and 28 assigned to STN completed the visit at 10 years.

The study’s primary outcome was change in the Unified Parkinson Disease Rating Scale (UPDRS) motor subscale score while off medication and on stimulation between targets. Secondary outcomes included tremor, rigidity, and bradykinesia.

The two groups of patients had comparable baseline characteristics. Mean age was approximately 59 years in both groups. The proportion of male patients was 87% in the GPi group and 83% in the STN group. White patients predominated in the GPi (98%) and STN (94%) groups.

Average disease duration was approximately 11 years, and more than 10% of patients in each group were older than 70 years, indicating a “somewhat more advanced patient cohort,” said Dr. Ostrem.

Although the study’s dropout rate was high, the researchers found no difference in baseline characteristics between patients who did and did not complete the study.
 

Consistent motor improvement

Motor function improved at all timepoints for patients in both study arms. Baseline UPDRS motor subscale score was 43.2 for patients assigned to GPi stimulation. This score changed to 25.8 at 2 years (P < .001), 35.4 at 7 years (P < .001), and 34.0 at 10 years (P = .10).

Baseline UPDRS motor subscale score also was 43.2 for patients assigned to STN stimulation. This score changed to 27.7 at 2 years (P < .001), 34.4 at 7 years (P < .001), and 28.3 at 10 years (P < .001). Improvements were similar between groups but tended to be greater in the STN group.

Among the study’s secondary outcomes, tremor subscales showed the greatest improvement over time, followed by rigidity subscores. Compared with GPi DBS, STN DBS was associated with greater improvement in bradykinesia subscores at 7 and 10 years (P = .03).

In addition, UPDRS I, II, and IV scores, as recorded in motor diaries, showed significant long-term improvement in both study groups. Part I (which reflects mentation and mood) and part II (which reflects activities of daily living) tended to worsen at 7 and 10 years. There were no differences between groups.

Total score on the Parkinson’s Disease Questionnaire-39 (PDQ-39), which measures function in daily living, no longer showed improvement at 7 or 10 years for either target. Rather, it showed worsening, compared with baseline.

“Cognitive impairment and gait and balance issues result in more issues with quality of life and independence,” said Dr. Ostrem.

Stimulation of both targets reduced medication use significantly. There was no difference between targets for this outcome.

The rate of device-related complications in this cohort was comparatively low, said Dr. Ostrem. In the overall study complication, the rate of DBS malfunction was 7.7%, and the rate of DBS infection was 5.8%.

The finding that both targets had similar long-term sustainability of motor benefit provides reassurance that either target is a reasonable choice, said Dr. Ostrem. “I would suggest target choice be determined by a multidisciplinary team, where individual patient signs and symptoms and goals can be considered.”

Other large DBS trials with shorter follow-up durations have suggested differences between the targets. These data can guide the choice of target, said Dr. Ostrem.

“The field of DBS research has never been more exciting,” she added. Newer systems that include improved hardware and software and can record neurophysiologic data from the implanted brain leads could provide improved outcomes of DBS treatment. 

“With modern DBS methods and approaches, we are learning more about Parkinson’s disease and other brain diseases, which I believe will help us to find more treatments and other interventions to slow the progression or minimize symptoms,” Dr. Ostrem concluded.
 

Selection bias?

Commenting on the study, Alfonso Fasano, MD, PhD, chair in neuromodulation and multidisciplinary care at University of Toronto, noted that “these are the first long-term findings resulting from a randomized trial, overall supporting the early notion that STN DBS is superior to GPi DBS in terms of bradykinesia improvement, especially in the long-run.”

The findings reflect the clinical practice of considering STN deep brain stimulation for young patients who face a longer disease duration. Younger patients might tolerate the procedure better than older patients. They also may achieve medication reduction, better motor control, and the possibility of increasing medication when side effects make increased stimulation undesirable.

“It’s interesting to note that even GPi DBS maintained an overall good outcome over time,” said Dr. Fasano. This finding contrasts with that of previous studies, but the latter were limited by selection bias, he added. “Older and frail patients were more likely to be treated with GPi DBS.”

Two factors limit the study’s findings, said Dr. Fasano. During the long study duration, many patients dropped out or were lost to follow-up. “Thus, it is conceivable that the study only enrolled the best responders in each group,” said Dr. Fasano.

In addition, the results of the trial that the current investigators analyzed are not necessarily generalizable, as those who conducted it soon recognized. The study by the VA and NINDS did not detect differences between targets, mainly because of a surprisingly low effect of STN deep brain stimulation. The researchers determined that this finding was related to the study’s inclusion criteria.

“The lack of improvement [on the PDQ-39] clearly indicates that simply treating the motor problems of Parkinson’s disease patients is not enough,” said Dr. Fasano. It also emphasizes that DBS is a symptomatic therapy with little or no effect on the disease’s natural history.

“It will be also important to see how the new data reported by Dr. Ostrem compare to the long-term outcome of the other major STN versus GPi trial from Europe,” said Dr. Fasano, referring to the NSTAPS trial.

He added that it will also be interesting to follow these cohorts for at least 5 more years in order to identify possible differences in terms of disease milestones such as dementia and survival. Previous studies have shown a reduction in survival with targets other than STN, but this finding likely reflects selection bias, he concluded.

The study was funded by the National Institute of Neurological Disorders and Stroke and the U.S. Department of Veterans Affairs. Dr. Ostrem previously has accepted consulting funds from Medtronic and Abbott. She receives grant support from Medtronic and Boston Scientific for fellowship training and clinical trial support. These companies were not involved in the study. Dr. Fasano received honoraria and research support and honoraria from Abbott, Boston Scientific, Brainlab, Ceregate, Inbrain, and Medtronic.

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

Deep brain stimulation (DBS) significantly improves motor function in patients with Parkinson’s disease over the long term, regardless of the therapeutic target, new research shows. In the longest follow-up study comparing the subthalamic nucleus (STN) or the globus pallidus (GPi) as treatment targets for Parkinson’s disease, investigators found DBS was effective at 10 years regardless of which of these two brain regions were treated.

“Both STN and GPi DBS maintained motor benefit out to 10 years, with improvements seen in tremor and rigidity, greater than bradykinesia,” said study author Jill L. Ostrem, MD, medical director and division chief at the University of California, San Francisco Movement Disorders and Neuromodulation Center.

“Less medication was required, and patients had fewer motor fluctuations and less dyskinesia,” she added. But nonmotor symptoms and other symptoms that are less responsive to DBS progress led to worsening disability over time.

The findings were presented at the American Academy of Neurology’s 2021 annual meeting.
 

Advanced patients  

Many studies have examined the GPi and STN as targets for deep brain stimulation in Parkinson’s disease. Some research has compared outcomes between the two targets, but no prospective, randomized trials have evaluated outcomes beyond 3 years of treatment.

For the study, investigators examined data from Study 468, a multicenter, randomized, controlled trial conducted by the U.S. Veterans Affairs (VA) Cooperative Study Program and the National Institute of Neurological Disorders and Stroke (NINDS). In this study, a subset of patients who had been randomly assigned to deep brain stimulation of the GPi or STN were followed for up to 10 years.

Participants were examined at 2 years, 7 years, and 10 years. Eighty-five participants assigned to GPi and 70 assigned to STN completed the visit at 2 years. At 7 years, 68 GPi patients and 49 STN patients completed the visit. Forty-nine patients assigned to GPi and 28 assigned to STN completed the visit at 10 years.

The study’s primary outcome was change in the Unified Parkinson Disease Rating Scale (UPDRS) motor subscale score while off medication and on stimulation between targets. Secondary outcomes included tremor, rigidity, and bradykinesia.

The two groups of patients had comparable baseline characteristics. Mean age was approximately 59 years in both groups. The proportion of male patients was 87% in the GPi group and 83% in the STN group. White patients predominated in the GPi (98%) and STN (94%) groups.

Average disease duration was approximately 11 years, and more than 10% of patients in each group were older than 70 years, indicating a “somewhat more advanced patient cohort,” said Dr. Ostrem.

Although the study’s dropout rate was high, the researchers found no difference in baseline characteristics between patients who did and did not complete the study.
 

Consistent motor improvement

Motor function improved at all timepoints for patients in both study arms. Baseline UPDRS motor subscale score was 43.2 for patients assigned to GPi stimulation. This score changed to 25.8 at 2 years (P < .001), 35.4 at 7 years (P < .001), and 34.0 at 10 years (P = .10).

Baseline UPDRS motor subscale score also was 43.2 for patients assigned to STN stimulation. This score changed to 27.7 at 2 years (P < .001), 34.4 at 7 years (P < .001), and 28.3 at 10 years (P < .001). Improvements were similar between groups but tended to be greater in the STN group.

Among the study’s secondary outcomes, tremor subscales showed the greatest improvement over time, followed by rigidity subscores. Compared with GPi DBS, STN DBS was associated with greater improvement in bradykinesia subscores at 7 and 10 years (P = .03).

In addition, UPDRS I, II, and IV scores, as recorded in motor diaries, showed significant long-term improvement in both study groups. Part I (which reflects mentation and mood) and part II (which reflects activities of daily living) tended to worsen at 7 and 10 years. There were no differences between groups.

Total score on the Parkinson’s Disease Questionnaire-39 (PDQ-39), which measures function in daily living, no longer showed improvement at 7 or 10 years for either target. Rather, it showed worsening, compared with baseline.

“Cognitive impairment and gait and balance issues result in more issues with quality of life and independence,” said Dr. Ostrem.

Stimulation of both targets reduced medication use significantly. There was no difference between targets for this outcome.

The rate of device-related complications in this cohort was comparatively low, said Dr. Ostrem. In the overall study complication, the rate of DBS malfunction was 7.7%, and the rate of DBS infection was 5.8%.

The finding that both targets had similar long-term sustainability of motor benefit provides reassurance that either target is a reasonable choice, said Dr. Ostrem. “I would suggest target choice be determined by a multidisciplinary team, where individual patient signs and symptoms and goals can be considered.”

Other large DBS trials with shorter follow-up durations have suggested differences between the targets. These data can guide the choice of target, said Dr. Ostrem.

“The field of DBS research has never been more exciting,” she added. Newer systems that include improved hardware and software and can record neurophysiologic data from the implanted brain leads could provide improved outcomes of DBS treatment. 

“With modern DBS methods and approaches, we are learning more about Parkinson’s disease and other brain diseases, which I believe will help us to find more treatments and other interventions to slow the progression or minimize symptoms,” Dr. Ostrem concluded.
 

Selection bias?

Commenting on the study, Alfonso Fasano, MD, PhD, chair in neuromodulation and multidisciplinary care at University of Toronto, noted that “these are the first long-term findings resulting from a randomized trial, overall supporting the early notion that STN DBS is superior to GPi DBS in terms of bradykinesia improvement, especially in the long-run.”

The findings reflect the clinical practice of considering STN deep brain stimulation for young patients who face a longer disease duration. Younger patients might tolerate the procedure better than older patients. They also may achieve medication reduction, better motor control, and the possibility of increasing medication when side effects make increased stimulation undesirable.

“It’s interesting to note that even GPi DBS maintained an overall good outcome over time,” said Dr. Fasano. This finding contrasts with that of previous studies, but the latter were limited by selection bias, he added. “Older and frail patients were more likely to be treated with GPi DBS.”

Two factors limit the study’s findings, said Dr. Fasano. During the long study duration, many patients dropped out or were lost to follow-up. “Thus, it is conceivable that the study only enrolled the best responders in each group,” said Dr. Fasano.

In addition, the results of the trial that the current investigators analyzed are not necessarily generalizable, as those who conducted it soon recognized. The study by the VA and NINDS did not detect differences between targets, mainly because of a surprisingly low effect of STN deep brain stimulation. The researchers determined that this finding was related to the study’s inclusion criteria.

“The lack of improvement [on the PDQ-39] clearly indicates that simply treating the motor problems of Parkinson’s disease patients is not enough,” said Dr. Fasano. It also emphasizes that DBS is a symptomatic therapy with little or no effect on the disease’s natural history.

“It will be also important to see how the new data reported by Dr. Ostrem compare to the long-term outcome of the other major STN versus GPi trial from Europe,” said Dr. Fasano, referring to the NSTAPS trial.

He added that it will also be interesting to follow these cohorts for at least 5 more years in order to identify possible differences in terms of disease milestones such as dementia and survival. Previous studies have shown a reduction in survival with targets other than STN, but this finding likely reflects selection bias, he concluded.

The study was funded by the National Institute of Neurological Disorders and Stroke and the U.S. Department of Veterans Affairs. Dr. Ostrem previously has accepted consulting funds from Medtronic and Abbott. She receives grant support from Medtronic and Boston Scientific for fellowship training and clinical trial support. These companies were not involved in the study. Dr. Fasano received honoraria and research support and honoraria from Abbott, Boston Scientific, Brainlab, Ceregate, Inbrain, and Medtronic.

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

Schizophrenia patients with parkinsonism show unique neurodevelopmental signatures on imaging that involve the sensorimotor system, according to MRI data from 73 adult schizophrenia patients.

Although sensorimotor abnormalities are common in patients with schizophrenia, the neurobiology of parkinsonism in particular is not well understood. Aberrant neurodevelopment is considered a potential mechanism of action for the emergence of such abnormalities, wrote Robert Christian Wolf, MD, of Heidelberg (Germany) University, and colleagues.

In a multimodal MRI study published in Schizophrenia Research, the investigators identified 38 adults with schizophrenia and parkinsonism (SZ-P), 35 schizophrenia patients without parkinsonism (SZ-nonP), and 20 healthy controls.

Parkinsonism was defined as scores of 4 or higher on the Simpson-Angus Scale, while non-Parkinsonism schizophrenia patients had scores of 1 or less.

The researchers examined cortical and subcortical gray-matter volume, as well as three cortical surface markers related to neurodevelopment: cortical thickness (CTh), complexity of cortical folding (CCF), and sulcus depth.

Overall, the SZ-P patients showed increased CCF in the left supplementary motor cortex (SMC) and decreased left postcentral sulcus depth, compared with SZ-nonP patients (P < .05). The left SMC also showed increased CCF, compared with healthy controls – but that difference was not significant.

Both SZ-P and SZ-nonP patients showed higher levels of activity in the left SMC, compared with controls, and activity was higher in SZ-nonP patients, compared with SZ-P patients. In addition, parkinsonism severity was negatively associated with left middle frontal CCF and left anterior cingulate cortex CTh, Dr. Wolf and colleagues reported.

“Overall, the data support the notion that cortical features of distinct neurodevelopmental origin, particularly cortical folding indices such as CCF and sulcus depth, contribute to the pathogenesis of parkinsonism in SZ,” the researchers said.

The study findings were limited by several factors, including the cross-sectional design, the challenges of using the potential restraint inherent in the Simpson-Angus Scale to diagnose parkinsonism, the inability to gauge the impact of lifetime exposure to antipsychotics, and the inability to identify changes in brain stem nuclei, the researchers noted. However, the results suggest the impact of cortical development on parkinsonism in schizophrenia,.

“Cortical surface changes in the sensorimotor system suggest abnormal neurodevelopmental processes that are associated with increased risk for intrinsic sensorimotor abnormalities in SZ and related psychotic disorders,” they concluded.

The study was supported by the German Research Foundation and the German Federal Ministry of Education and Research. The researchers disclosed no financial conflicts.

Schizophrenia patients with parkinsonism show unique neurodevelopmental signatures on imaging that involve the sensorimotor system, according to MRI data from 73 adult schizophrenia patients.

Although sensorimotor abnormalities are common in patients with schizophrenia, the neurobiology of parkinsonism in particular is not well understood. Aberrant neurodevelopment is considered a potential mechanism of action for the emergence of such abnormalities, wrote Robert Christian Wolf, MD, of Heidelberg (Germany) University, and colleagues.

In a multimodal MRI study published in Schizophrenia Research, the investigators identified 38 adults with schizophrenia and parkinsonism (SZ-P), 35 schizophrenia patients without parkinsonism (SZ-nonP), and 20 healthy controls.

Parkinsonism was defined as scores of 4 or higher on the Simpson-Angus Scale, while non-Parkinsonism schizophrenia patients had scores of 1 or less.

The researchers examined cortical and subcortical gray-matter volume, as well as three cortical surface markers related to neurodevelopment: cortical thickness (CTh), complexity of cortical folding (CCF), and sulcus depth.

Overall, the SZ-P patients showed increased CCF in the left supplementary motor cortex (SMC) and decreased left postcentral sulcus depth, compared with SZ-nonP patients (P < .05). The left SMC also showed increased CCF, compared with healthy controls – but that difference was not significant.

Both SZ-P and SZ-nonP patients showed higher levels of activity in the left SMC, compared with controls, and activity was higher in SZ-nonP patients, compared with SZ-P patients. In addition, parkinsonism severity was negatively associated with left middle frontal CCF and left anterior cingulate cortex CTh, Dr. Wolf and colleagues reported.

“Overall, the data support the notion that cortical features of distinct neurodevelopmental origin, particularly cortical folding indices such as CCF and sulcus depth, contribute to the pathogenesis of parkinsonism in SZ,” the researchers said.

The study findings were limited by several factors, including the cross-sectional design, the challenges of using the potential restraint inherent in the Simpson-Angus Scale to diagnose parkinsonism, the inability to gauge the impact of lifetime exposure to antipsychotics, and the inability to identify changes in brain stem nuclei, the researchers noted. However, the results suggest the impact of cortical development on parkinsonism in schizophrenia,.

“Cortical surface changes in the sensorimotor system suggest abnormal neurodevelopmental processes that are associated with increased risk for intrinsic sensorimotor abnormalities in SZ and related psychotic disorders,” they concluded.

The study was supported by the German Research Foundation and the German Federal Ministry of Education and Research. The researchers disclosed no financial conflicts.

Schizophrenia patients with parkinsonism show unique neurodevelopmental signatures on imaging that involve the sensorimotor system, according to MRI data from 73 adult schizophrenia patients.

Although sensorimotor abnormalities are common in patients with schizophrenia, the neurobiology of parkinsonism in particular is not well understood. Aberrant neurodevelopment is considered a potential mechanism of action for the emergence of such abnormalities, wrote Robert Christian Wolf, MD, of Heidelberg (Germany) University, and colleagues.

In a multimodal MRI study published in Schizophrenia Research, the investigators identified 38 adults with schizophrenia and parkinsonism (SZ-P), 35 schizophrenia patients without parkinsonism (SZ-nonP), and 20 healthy controls.

Parkinsonism was defined as scores of 4 or higher on the Simpson-Angus Scale, while non-Parkinsonism schizophrenia patients had scores of 1 or less.

The researchers examined cortical and subcortical gray-matter volume, as well as three cortical surface markers related to neurodevelopment: cortical thickness (CTh), complexity of cortical folding (CCF), and sulcus depth.

Overall, the SZ-P patients showed increased CCF in the left supplementary motor cortex (SMC) and decreased left postcentral sulcus depth, compared with SZ-nonP patients (P < .05). The left SMC also showed increased CCF, compared with healthy controls – but that difference was not significant.

Both SZ-P and SZ-nonP patients showed higher levels of activity in the left SMC, compared with controls, and activity was higher in SZ-nonP patients, compared with SZ-P patients. In addition, parkinsonism severity was negatively associated with left middle frontal CCF and left anterior cingulate cortex CTh, Dr. Wolf and colleagues reported.

“Overall, the data support the notion that cortical features of distinct neurodevelopmental origin, particularly cortical folding indices such as CCF and sulcus depth, contribute to the pathogenesis of parkinsonism in SZ,” the researchers said.

The study findings were limited by several factors, including the cross-sectional design, the challenges of using the potential restraint inherent in the Simpson-Angus Scale to diagnose parkinsonism, the inability to gauge the impact of lifetime exposure to antipsychotics, and the inability to identify changes in brain stem nuclei, the researchers noted. However, the results suggest the impact of cortical development on parkinsonism in schizophrenia,.

“Cortical surface changes in the sensorimotor system suggest abnormal neurodevelopmental processes that are associated with increased risk for intrinsic sensorimotor abnormalities in SZ and related psychotic disorders,” they concluded.

The study was supported by the German Research Foundation and the German Federal Ministry of Education and Research. The researchers disclosed no financial conflicts.