New and Noteworthy Information—April 2016

Carotid endarterectomy is superior to carotid artery stenting in patients age 70 and older with symptomatic carotid stenosis, according to a study published online ahead of print February 12 in the Lancet. Researchers analyzed individual patient data from four randomized controlled trials. In all, 4,754 patients were randomly assigned to carotid endarterectomy or carotid artery stenting. For patients assigned to carotid artery stenting, the periprocedural hazard ratio for stroke and death in patients age 65 to 69, compared with patients younger than 60, was 2.16. The hazard ratio was about 4.0 for patients age 70 or older. There was no evidence of an increased periprocedural risk by age group with carotid endarterectomy. Age was not associated with the postprocedural stroke risk either within treatment group or between treatment groups.

Having a history of major surgery is associated with a negligibly lower level of cognitive functioning, according to a study published in the February issue of Anesthesiology. Using linear regression adjusted for sex and age, investigators compared results from five cognitive tests between twins who had major, minor, hip, knee replacement, or other surgery, and a reference group of twins without surgery. Genetic and shared environmental confounding was addressed in intrapair analysis of 87 monozygotic and 124 dizygotic same-sex twin pairs in whom one had a history of major surgery and the other did not. Compared with the reference group, twins with at least one major surgery had a composite cognitive score that was one tenth of one standard deviation lower.

Alcohol consumption immediately raises cardiovascular risk, but risk remains high only following heavy alcohol consumption, according to a study published March 8 in Circulation. Researchers identified 23 studies including 29,457 participants that assessed the association between alcohol intake and cardiovascular events in the subsequent hours and days. They calculated pooled relative risks for the association between alcohol intake and myocardial infarction, ischemic stroke, and hemorrhagic stroke. Their analysis was based on DerSimonian and Laird random-effects models. Moderate alcohol consumption was associated with a higher cardiovascular risk that was attenuated after 24 hours. Moderate alcohol consumption also was protective against myocardial infarction, hemorrhagic stroke, and ischemic stroke within one week. Heavy alcohol consumption was associated with higher cardiovascular risk during the following day and week.

Hostile attitudes and effortful coping in young adulthood are associated with worse cognition in midlife, according to a study published online ahead of print March 2 in Neurology. Investigators used linear regression to examine the association of these two characteristics at baseline with subsequent cognitive ability in 3,126 black and white people. Baseline hostility and effortful coping were prospectively associated with lower cognitive function 25 years later, controlling for age, sex, race, education, long-term exposure to depression, discrimination, negative life events, and baseline cognitive ability. Compared with the lowest quartile, those in the highest quartile of hostility performed 0.21 standard deviation units lower on cognitive tasks. Those in the highest quartile of effortful coping performed 0.30 standard deviation units lower on cognitive tasks, compared with those in the lowest quartile.

Insufficient amounts of vitamin D during pregnancy may increase the risk of multiple sclerosis (MS) in offspring, according to a study published online ahead of print March 7 in JAMA Neurology. Researchers identified 193 people who received a diagnosis of MS before December 31, 2009, and matched 176 cases with 326 controls. Maternal serum vitamin D levels were measured using a chemiluminescence assay. Mean maternal vitamin D levels were in the insufficient range, but were higher in controls than in cases. Maternal vitamin D deficiency during early pregnancy was associated with a nearly twofold increased risk of MS in the offspring, compared with maternal vitamin D sufficiency. The researchers found no statistically significant association between the risk of MS and increasing serum vitamin D levels.

Comorbidity is more common than expected in multiple sclerosis (MS), even around the time of diagnosis, according to a study published online ahead of print March 9 in Neurology. Using population-based administrative health data, researchers identified 23,382 incident MS cases and 116,638 age-, sex-, and geographically matched controls. Investigators estimated the prevalence of hypertension, diabetes, hyperlipidemia, heart disease, chronic lung disease, epilepsy, fibromyalgia, inflammatory bowel disease, depression, anxiety, bipolar disorder, and schizophrenia at MS diagnosis using validated case definitions. Compared with the matched population, all comorbidities except hyperlipidemia were more common in the MS population. The prevalence of hypertension was 16% higher for women with MS and 48% higher for men with MS, compared with controls. Diabetes, epilepsy, depression, and anxiety were more prevalent among men with MS than women with MS.

Increasing energy output from various physical activities is related to larger gray matter volumes in the elderly, regardless of cognitive status, according to a study published online ahead of print March 11 in the Journal of Alzheimer’s Disease. Subjects were recruited from a population-based longitudinal study of cardiovascular health in people age 65 or older. Researchers analyzed a subsample of 876 subjects for whom data about energy output, cognition, and brain volume were available. Higher energy output from various physical activity types was associated with larger gray matter volumes in frontal, temporal, and parietal lobes, as well as in the hippocampus, thalamus, and basal ganglia. High levels of caloric expenditure moderated neurodegeneration-associated volume loss in the precuneus, posterior cingulate, and cerebellar vermis.

Periodontitis is associated with an increase in cognitive decline in Alzheimer’s disease, independent of baseline cognitive state, according to a study published March 10 in PLoS One. The increase may be mediated through effects on systemic inflammation. In a six-month observational cohort study, 60 participants with mild to moderate Alzheimer’s disease underwent cognitive assessments and blood tests for systemic inflammatory markers. A dental hygienist who was blind to cognitive outcomes assessed participants’ dental health. Participants were followed up at six months, when all assessments were repeated. Periodontitis at baseline was not related to baseline cognitive state, but was associated with a sixfold increase in the rate of cognitive decline, as measured by the Alzheimer’s Disease Assessment Scale–Cognitive subscale, over a six-month follow-up period.

Zika virus infection can cause Guillain-Barré syndrome, according to a study published online ahead of print February 29 in the Lancet. Researchers examined people diagnosed with Guillain-Barré syndrome during an outbreak in French Polynesia, along with two groups of matched controls. In all, 42 patients were diagnosed with Guillain-Barré syndrome during the study period, and 41 of them had anti-Zika virus immunoglobulin M (IgM) or immunoglobulin G. All cases had neutralizing antibodies against Zika virus, compared with 54 of 98 participants in control group 1. Furthermore, 39 cases had Zika virus IgM, and 37 had experienced a transient illness at a median of six days before the onset of neurologic symptoms. Patients with Guillain-Barré syndrome had electrophysiologic findings compatible with acute motor axonal neuropathy type and had rapid evolution of disease.

Radiosurgery may benefit some patients with arteriovenous malformations, according to a study published in the February issue of Stroke. Researchers combined cerebral arteriovenous malformation radiosurgery outcome data from seven institutions participating in the International Gamma Knife Research Foundation. The cohort included 509 patients with a mean age of 40. Favorable outcome was defined as obliteration of malformation, no postprocedural hemorrhage, and no permanent radiation-induced changes. Adverse outcome was defined as any new or worsening neurologic symptoms or death. Arteriovenous malformation was obliterated in 75% of patients. The postradiosurgery hemorrhage rate during the latency period was 0.9% per year. Symptomatic and permanent radiation-induced changes occurred in 11% and 3% of patients, respectively. The rates of favorable outcome, adverse neurologic outcome, permanent neurologic morbidity, and mortality were 70%, 13%, 5%, and 4%, respectively.

A video-game-based cognitive rehabilitation program changes thalamocortical functional connectivity and improves cognition in patients with multiple sclerosis (MS), according to a study published online ahead of print March 8 in Radiology. Researchers randomized 24 patients with MS and cognitive impairment to the cognitive rehabilitation program or a wait-list group. Patients were evaluated with cognitive tests and 3-T resting-state functional MRI at baseline and at eight weeks. Eleven healthy controls also underwent baseline resting-state functional MRI. Patients with MS had lower thalamocortical functional connectivity at baseline than controls. At follow-up, the intervention group had increased functional connectivity in the cingulum, precuneus, and bilateral parietal cortex, and lower functional connectivity in the cerebellum and the left prefrontal cortex, compared with the wait-list group. These changes correlated with cognitive improvement.

Traumatic brain injury (TBI) may be a risk factor for mild cognitive impairment (MCI), but the association between the two may be related to gender and depression, according to a study published online ahead of print February 8 in the Journal of Alzheimer’s Disease. Investigators examined data for 3,187 people with MCI and 3,244 people with normal cognition. TBI was categorized based on lifetime reported TBI with loss of consciousness without chronic deficit. TBI history was a significant predictor of MCI and was associated with increased odds of MCI diagnosis in unadjusted models and adjusted models accounting for age, education, APOE4, and a composite vascular score. The association was largely attenuated after adjustment for history of depression. MCI was diagnosed a mean of 2.3 years earlier among people with TBI.

The FDA has approved Briviact (brivaracetam) as an adjunctive therapy in the treatment of partial-onset seizures in patients age 16 and older with epilepsy. Briviact’s effectiveness was studied in three clinical trials including 1,550 participants. Briviact, taken along with other medications, effectively reduced seizure frequency. The most common side effects reported by people taking Briviact in clinical trials include drowsiness, dizziness, fatigue, nausea, and vomiting. Briviact will be available in film-coated tablets, oral solution, and injection. Briviact injection can be used when oral administration is temporarily not feasible. The recommended starting dosage is 50 mg twice daily. Based on individual patient tolerability and therapeutic response, the dose may be adjusted to 25 mg twice daily or 100 mg twice daily. UCB, headquartered in Brussels, manufactures the drug.

—Kimberly Williams

Carotid endarterectomy is superior to carotid artery stenting in patients age 70 and older with symptomatic carotid stenosis, according to a study published online ahead of print February 12 in the Lancet. Researchers analyzed individual patient data from four randomized controlled trials. In all, 4,754 patients were randomly assigned to carotid endarterectomy or carotid artery stenting. For patients assigned to carotid artery stenting, the periprocedural hazard ratio for stroke and death in patients age 65 to 69, compared with patients younger than 60, was 2.16. The hazard ratio was about 4.0 for patients age 70 or older. There was no evidence of an increased periprocedural risk by age group with carotid endarterectomy. Age was not associated with the postprocedural stroke risk either within treatment group or between treatment groups.

Having a history of major surgery is associated with a negligibly lower level of cognitive functioning, according to a study published in the February issue of Anesthesiology. Using linear regression adjusted for sex and age, investigators compared results from five cognitive tests between twins who had major, minor, hip, knee replacement, or other surgery, and a reference group of twins without surgery. Genetic and shared environmental confounding was addressed in intrapair analysis of 87 monozygotic and 124 dizygotic same-sex twin pairs in whom one had a history of major surgery and the other did not. Compared with the reference group, twins with at least one major surgery had a composite cognitive score that was one tenth of one standard deviation lower.

Alcohol consumption immediately raises cardiovascular risk, but risk remains high only following heavy alcohol consumption, according to a study published March 8 in Circulation. Researchers identified 23 studies including 29,457 participants that assessed the association between alcohol intake and cardiovascular events in the subsequent hours and days. They calculated pooled relative risks for the association between alcohol intake and myocardial infarction, ischemic stroke, and hemorrhagic stroke. Their analysis was based on DerSimonian and Laird random-effects models. Moderate alcohol consumption was associated with a higher cardiovascular risk that was attenuated after 24 hours. Moderate alcohol consumption also was protective against myocardial infarction, hemorrhagic stroke, and ischemic stroke within one week. Heavy alcohol consumption was associated with higher cardiovascular risk during the following day and week.

Hostile attitudes and effortful coping in young adulthood are associated with worse cognition in midlife, according to a study published online ahead of print March 2 in Neurology. Investigators used linear regression to examine the association of these two characteristics at baseline with subsequent cognitive ability in 3,126 black and white people. Baseline hostility and effortful coping were prospectively associated with lower cognitive function 25 years later, controlling for age, sex, race, education, long-term exposure to depression, discrimination, negative life events, and baseline cognitive ability. Compared with the lowest quartile, those in the highest quartile of hostility performed 0.21 standard deviation units lower on cognitive tasks. Those in the highest quartile of effortful coping performed 0.30 standard deviation units lower on cognitive tasks, compared with those in the lowest quartile.

Insufficient amounts of vitamin D during pregnancy may increase the risk of multiple sclerosis (MS) in offspring, according to a study published online ahead of print March 7 in JAMA Neurology. Researchers identified 193 people who received a diagnosis of MS before December 31, 2009, and matched 176 cases with 326 controls. Maternal serum vitamin D levels were measured using a chemiluminescence assay. Mean maternal vitamin D levels were in the insufficient range, but were higher in controls than in cases. Maternal vitamin D deficiency during early pregnancy was associated with a nearly twofold increased risk of MS in the offspring, compared with maternal vitamin D sufficiency. The researchers found no statistically significant association between the risk of MS and increasing serum vitamin D levels.

Comorbidity is more common than expected in multiple sclerosis (MS), even around the time of diagnosis, according to a study published online ahead of print March 9 in Neurology. Using population-based administrative health data, researchers identified 23,382 incident MS cases and 116,638 age-, sex-, and geographically matched controls. Investigators estimated the prevalence of hypertension, diabetes, hyperlipidemia, heart disease, chronic lung disease, epilepsy, fibromyalgia, inflammatory bowel disease, depression, anxiety, bipolar disorder, and schizophrenia at MS diagnosis using validated case definitions. Compared with the matched population, all comorbidities except hyperlipidemia were more common in the MS population. The prevalence of hypertension was 16% higher for women with MS and 48% higher for men with MS, compared with controls. Diabetes, epilepsy, depression, and anxiety were more prevalent among men with MS than women with MS.

Increasing energy output from various physical activities is related to larger gray matter volumes in the elderly, regardless of cognitive status, according to a study published online ahead of print March 11 in the Journal of Alzheimer’s Disease. Subjects were recruited from a population-based longitudinal study of cardiovascular health in people age 65 or older. Researchers analyzed a subsample of 876 subjects for whom data about energy output, cognition, and brain volume were available. Higher energy output from various physical activity types was associated with larger gray matter volumes in frontal, temporal, and parietal lobes, as well as in the hippocampus, thalamus, and basal ganglia. High levels of caloric expenditure moderated neurodegeneration-associated volume loss in the precuneus, posterior cingulate, and cerebellar vermis.

Periodontitis is associated with an increase in cognitive decline in Alzheimer’s disease, independent of baseline cognitive state, according to a study published March 10 in PLoS One. The increase may be mediated through effects on systemic inflammation. In a six-month observational cohort study, 60 participants with mild to moderate Alzheimer’s disease underwent cognitive assessments and blood tests for systemic inflammatory markers. A dental hygienist who was blind to cognitive outcomes assessed participants’ dental health. Participants were followed up at six months, when all assessments were repeated. Periodontitis at baseline was not related to baseline cognitive state, but was associated with a sixfold increase in the rate of cognitive decline, as measured by the Alzheimer’s Disease Assessment Scale–Cognitive subscale, over a six-month follow-up period.

Zika virus infection can cause Guillain-Barré syndrome, according to a study published online ahead of print February 29 in the Lancet. Researchers examined people diagnosed with Guillain-Barré syndrome during an outbreak in French Polynesia, along with two groups of matched controls. In all, 42 patients were diagnosed with Guillain-Barré syndrome during the study period, and 41 of them had anti-Zika virus immunoglobulin M (IgM) or immunoglobulin G. All cases had neutralizing antibodies against Zika virus, compared with 54 of 98 participants in control group 1. Furthermore, 39 cases had Zika virus IgM, and 37 had experienced a transient illness at a median of six days before the onset of neurologic symptoms. Patients with Guillain-Barré syndrome had electrophysiologic findings compatible with acute motor axonal neuropathy type and had rapid evolution of disease.

Radiosurgery may benefit some patients with arteriovenous malformations, according to a study published in the February issue of Stroke. Researchers combined cerebral arteriovenous malformation radiosurgery outcome data from seven institutions participating in the International Gamma Knife Research Foundation. The cohort included 509 patients with a mean age of 40. Favorable outcome was defined as obliteration of malformation, no postprocedural hemorrhage, and no permanent radiation-induced changes. Adverse outcome was defined as any new or worsening neurologic symptoms or death. Arteriovenous malformation was obliterated in 75% of patients. The postradiosurgery hemorrhage rate during the latency period was 0.9% per year. Symptomatic and permanent radiation-induced changes occurred in 11% and 3% of patients, respectively. The rates of favorable outcome, adverse neurologic outcome, permanent neurologic morbidity, and mortality were 70%, 13%, 5%, and 4%, respectively.

A video-game-based cognitive rehabilitation program changes thalamocortical functional connectivity and improves cognition in patients with multiple sclerosis (MS), according to a study published online ahead of print March 8 in Radiology. Researchers randomized 24 patients with MS and cognitive impairment to the cognitive rehabilitation program or a wait-list group. Patients were evaluated with cognitive tests and 3-T resting-state functional MRI at baseline and at eight weeks. Eleven healthy controls also underwent baseline resting-state functional MRI. Patients with MS had lower thalamocortical functional connectivity at baseline than controls. At follow-up, the intervention group had increased functional connectivity in the cingulum, precuneus, and bilateral parietal cortex, and lower functional connectivity in the cerebellum and the left prefrontal cortex, compared with the wait-list group. These changes correlated with cognitive improvement.

Traumatic brain injury (TBI) may be a risk factor for mild cognitive impairment (MCI), but the association between the two may be related to gender and depression, according to a study published online ahead of print February 8 in the Journal of Alzheimer’s Disease. Investigators examined data for 3,187 people with MCI and 3,244 people with normal cognition. TBI was categorized based on lifetime reported TBI with loss of consciousness without chronic deficit. TBI history was a significant predictor of MCI and was associated with increased odds of MCI diagnosis in unadjusted models and adjusted models accounting for age, education, APOE4, and a composite vascular score. The association was largely attenuated after adjustment for history of depression. MCI was diagnosed a mean of 2.3 years earlier among people with TBI.

The FDA has approved Briviact (brivaracetam) as an adjunctive therapy in the treatment of partial-onset seizures in patients age 16 and older with epilepsy. Briviact’s effectiveness was studied in three clinical trials including 1,550 participants. Briviact, taken along with other medications, effectively reduced seizure frequency. The most common side effects reported by people taking Briviact in clinical trials include drowsiness, dizziness, fatigue, nausea, and vomiting. Briviact will be available in film-coated tablets, oral solution, and injection. Briviact injection can be used when oral administration is temporarily not feasible. The recommended starting dosage is 50 mg twice daily. Based on individual patient tolerability and therapeutic response, the dose may be adjusted to 25 mg twice daily or 100 mg twice daily. UCB, headquartered in Brussels, manufactures the drug.

—Kimberly Williams

Carotid endarterectomy is superior to carotid artery stenting in patients age 70 and older with symptomatic carotid stenosis, according to a study published online ahead of print February 12 in the Lancet. Researchers analyzed individual patient data from four randomized controlled trials. In all, 4,754 patients were randomly assigned to carotid endarterectomy or carotid artery stenting. For patients assigned to carotid artery stenting, the periprocedural hazard ratio for stroke and death in patients age 65 to 69, compared with patients younger than 60, was 2.16. The hazard ratio was about 4.0 for patients age 70 or older. There was no evidence of an increased periprocedural risk by age group with carotid endarterectomy. Age was not associated with the postprocedural stroke risk either within treatment group or between treatment groups.

Having a history of major surgery is associated with a negligibly lower level of cognitive functioning, according to a study published in the February issue of Anesthesiology. Using linear regression adjusted for sex and age, investigators compared results from five cognitive tests between twins who had major, minor, hip, knee replacement, or other surgery, and a reference group of twins without surgery. Genetic and shared environmental confounding was addressed in intrapair analysis of 87 monozygotic and 124 dizygotic same-sex twin pairs in whom one had a history of major surgery and the other did not. Compared with the reference group, twins with at least one major surgery had a composite cognitive score that was one tenth of one standard deviation lower.

Alcohol consumption immediately raises cardiovascular risk, but risk remains high only following heavy alcohol consumption, according to a study published March 8 in Circulation. Researchers identified 23 studies including 29,457 participants that assessed the association between alcohol intake and cardiovascular events in the subsequent hours and days. They calculated pooled relative risks for the association between alcohol intake and myocardial infarction, ischemic stroke, and hemorrhagic stroke. Their analysis was based on DerSimonian and Laird random-effects models. Moderate alcohol consumption was associated with a higher cardiovascular risk that was attenuated after 24 hours. Moderate alcohol consumption also was protective against myocardial infarction, hemorrhagic stroke, and ischemic stroke within one week. Heavy alcohol consumption was associated with higher cardiovascular risk during the following day and week.

Hostile attitudes and effortful coping in young adulthood are associated with worse cognition in midlife, according to a study published online ahead of print March 2 in Neurology. Investigators used linear regression to examine the association of these two characteristics at baseline with subsequent cognitive ability in 3,126 black and white people. Baseline hostility and effortful coping were prospectively associated with lower cognitive function 25 years later, controlling for age, sex, race, education, long-term exposure to depression, discrimination, negative life events, and baseline cognitive ability. Compared with the lowest quartile, those in the highest quartile of hostility performed 0.21 standard deviation units lower on cognitive tasks. Those in the highest quartile of effortful coping performed 0.30 standard deviation units lower on cognitive tasks, compared with those in the lowest quartile.

Insufficient amounts of vitamin D during pregnancy may increase the risk of multiple sclerosis (MS) in offspring, according to a study published online ahead of print March 7 in JAMA Neurology. Researchers identified 193 people who received a diagnosis of MS before December 31, 2009, and matched 176 cases with 326 controls. Maternal serum vitamin D levels were measured using a chemiluminescence assay. Mean maternal vitamin D levels were in the insufficient range, but were higher in controls than in cases. Maternal vitamin D deficiency during early pregnancy was associated with a nearly twofold increased risk of MS in the offspring, compared with maternal vitamin D sufficiency. The researchers found no statistically significant association between the risk of MS and increasing serum vitamin D levels.

Comorbidity is more common than expected in multiple sclerosis (MS), even around the time of diagnosis, according to a study published online ahead of print March 9 in Neurology. Using population-based administrative health data, researchers identified 23,382 incident MS cases and 116,638 age-, sex-, and geographically matched controls. Investigators estimated the prevalence of hypertension, diabetes, hyperlipidemia, heart disease, chronic lung disease, epilepsy, fibromyalgia, inflammatory bowel disease, depression, anxiety, bipolar disorder, and schizophrenia at MS diagnosis using validated case definitions. Compared with the matched population, all comorbidities except hyperlipidemia were more common in the MS population. The prevalence of hypertension was 16% higher for women with MS and 48% higher for men with MS, compared with controls. Diabetes, epilepsy, depression, and anxiety were more prevalent among men with MS than women with MS.

Increasing energy output from various physical activities is related to larger gray matter volumes in the elderly, regardless of cognitive status, according to a study published online ahead of print March 11 in the Journal of Alzheimer’s Disease. Subjects were recruited from a population-based longitudinal study of cardiovascular health in people age 65 or older. Researchers analyzed a subsample of 876 subjects for whom data about energy output, cognition, and brain volume were available. Higher energy output from various physical activity types was associated with larger gray matter volumes in frontal, temporal, and parietal lobes, as well as in the hippocampus, thalamus, and basal ganglia. High levels of caloric expenditure moderated neurodegeneration-associated volume loss in the precuneus, posterior cingulate, and cerebellar vermis.

Periodontitis is associated with an increase in cognitive decline in Alzheimer’s disease, independent of baseline cognitive state, according to a study published March 10 in PLoS One. The increase may be mediated through effects on systemic inflammation. In a six-month observational cohort study, 60 participants with mild to moderate Alzheimer’s disease underwent cognitive assessments and blood tests for systemic inflammatory markers. A dental hygienist who was blind to cognitive outcomes assessed participants’ dental health. Participants were followed up at six months, when all assessments were repeated. Periodontitis at baseline was not related to baseline cognitive state, but was associated with a sixfold increase in the rate of cognitive decline, as measured by the Alzheimer’s Disease Assessment Scale–Cognitive subscale, over a six-month follow-up period.

Zika virus infection can cause Guillain-Barré syndrome, according to a study published online ahead of print February 29 in the Lancet. Researchers examined people diagnosed with Guillain-Barré syndrome during an outbreak in French Polynesia, along with two groups of matched controls. In all, 42 patients were diagnosed with Guillain-Barré syndrome during the study period, and 41 of them had anti-Zika virus immunoglobulin M (IgM) or immunoglobulin G. All cases had neutralizing antibodies against Zika virus, compared with 54 of 98 participants in control group 1. Furthermore, 39 cases had Zika virus IgM, and 37 had experienced a transient illness at a median of six days before the onset of neurologic symptoms. Patients with Guillain-Barré syndrome had electrophysiologic findings compatible with acute motor axonal neuropathy type and had rapid evolution of disease.

Radiosurgery may benefit some patients with arteriovenous malformations, according to a study published in the February issue of Stroke. Researchers combined cerebral arteriovenous malformation radiosurgery outcome data from seven institutions participating in the International Gamma Knife Research Foundation. The cohort included 509 patients with a mean age of 40. Favorable outcome was defined as obliteration of malformation, no postprocedural hemorrhage, and no permanent radiation-induced changes. Adverse outcome was defined as any new or worsening neurologic symptoms or death. Arteriovenous malformation was obliterated in 75% of patients. The postradiosurgery hemorrhage rate during the latency period was 0.9% per year. Symptomatic and permanent radiation-induced changes occurred in 11% and 3% of patients, respectively. The rates of favorable outcome, adverse neurologic outcome, permanent neurologic morbidity, and mortality were 70%, 13%, 5%, and 4%, respectively.

A video-game-based cognitive rehabilitation program changes thalamocortical functional connectivity and improves cognition in patients with multiple sclerosis (MS), according to a study published online ahead of print March 8 in Radiology. Researchers randomized 24 patients with MS and cognitive impairment to the cognitive rehabilitation program or a wait-list group. Patients were evaluated with cognitive tests and 3-T resting-state functional MRI at baseline and at eight weeks. Eleven healthy controls also underwent baseline resting-state functional MRI. Patients with MS had lower thalamocortical functional connectivity at baseline than controls. At follow-up, the intervention group had increased functional connectivity in the cingulum, precuneus, and bilateral parietal cortex, and lower functional connectivity in the cerebellum and the left prefrontal cortex, compared with the wait-list group. These changes correlated with cognitive improvement.

Traumatic brain injury (TBI) may be a risk factor for mild cognitive impairment (MCI), but the association between the two may be related to gender and depression, according to a study published online ahead of print February 8 in the Journal of Alzheimer’s Disease. Investigators examined data for 3,187 people with MCI and 3,244 people with normal cognition. TBI was categorized based on lifetime reported TBI with loss of consciousness without chronic deficit. TBI history was a significant predictor of MCI and was associated with increased odds of MCI diagnosis in unadjusted models and adjusted models accounting for age, education, APOE4, and a composite vascular score. The association was largely attenuated after adjustment for history of depression. MCI was diagnosed a mean of 2.3 years earlier among people with TBI.

The FDA has approved Briviact (brivaracetam) as an adjunctive therapy in the treatment of partial-onset seizures in patients age 16 and older with epilepsy. Briviact’s effectiveness was studied in three clinical trials including 1,550 participants. Briviact, taken along with other medications, effectively reduced seizure frequency. The most common side effects reported by people taking Briviact in clinical trials include drowsiness, dizziness, fatigue, nausea, and vomiting. Briviact will be available in film-coated tablets, oral solution, and injection. Briviact injection can be used when oral administration is temporarily not feasible. The recommended starting dosage is 50 mg twice daily. Based on individual patient tolerability and therapeutic response, the dose may be adjusted to 25 mg twice daily or 100 mg twice daily. UCB, headquartered in Brussels, manufactures the drug.

—Kimberly Williams