AANS Neurosurgeon | Volume 28, Number 4, 2019

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Extra Benefit from Epilepsy Neurostimulators — Reducing Comorbid Neuropsychiatric Symptoms

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People with drug-resistant epilepsy also can have deleterious neuropsychiatric symptoms like anxiety, depression, psychosis and impaired memory. These have negative impacts on quality of life, and there is an unmet need to improve therapy for such patients. Diagnosing and monitoring such neurobehavioral symptoms is challenging because their presentation can overlap with seizures.

Sandipan Pati, MD, and colleagues at the University of Alabama at Birmingham now report cases of five patients who found better treatments for those symptoms using data collected — while the patients were at home — from implanted neurostimulators placed in their brains to control their epileptic seizures. This is an extra benefit from the implanted Responsive Neurostimulator Systems, due to the system’s ability to record brain electrocorticography data initiated when a patient senses an anxiety or panic attack.

This data is key to showing whether the neuropsychiatric comorbidity began before, during or after an epileptic seizure. This guides medication or therapy changes that can reduce the negative symptoms caused by attacks that initiate outside of seizures, including psychogenic nonepileptic seizures. The only other way to get this useful information is video-electroencephalography in an inpatient clinic, with stays that typically last three to five days.

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