High-density EEG in Neurological Disorders

The purpose of the study is to use a new method of high-density electroencephalogram (HD-EEG) recording to map brain areas important for movement, sensation, language, emotion, and cognition.

This study will measure brain waves using high-density EEG. Participants will be asked wear a cap with electrodes attached to it. During the recording, participants may be asked to rest, sleep, or complete a task. The tasks involve viewing pictures, answering questions, speaking, or moving an arm or leg. Recordings generally last between 60-120 minutes.*

Electroencephalogram (EEG), Epilepsy, Lesion, Brain, Language, Movement, Sensation, Mapping, Dense-array EEG, High-density EEG, HD-EEG, stroke, Electrical Impedance Tomography

High-density EEG will be used for brain localization in patients who have recently experienced a stroke

This study will focus on obtaining a special type of high-density scalp electroencephalography (HD-EEG) recordings in patients with neurological disorders (i.e., epilepsy, brain tumor, stroke, etc.) and appropriately matched controls. HD-EEG is a scalp EEG which uses up to 256 channels compared to the standard 21 channels used for routine clinical applications. The reason for using more channels to record is for more precise localization of epileptogenic foci and/or more precise mapping of brain functions. This type of EEG requires the use of patient's own MRI scan to precisely localize activity. Therefore, all patients and controls getting an HD-EEG will require a structural MRI scan.

Inclusion Criteria: Able to perform the tasks Able to give own consent Exclusion Criteria: Any neurologic or psychiatric diagnosis such as stroke, tumor, or psychosis judged to interfere with high-density EEG.