Event-related desynchronization of sensorimotor EEG rhythms in hemiparetic patients with acute hemispheric stroke

Objective: To investigate the dynamics of EEG oscillations in patients with acute cortical or subcortical stroke during the performance of a sensorimotor task. Methods: A group of 17 patients with acute (2–13 days) hemiparesis caused by subcortical (n=10) or cortical strokes (n=7) as well as age-matched control subjects (n=10) were studied. Subjects pressed a mouse button either with their left or right index finger as required by a visual cue. Scalp EEG was recorded with 65 channels. Event-related desynchronization (ERD) was analyzed in four frequency bands covering the major spontaneous sensorimotor EEG rhythm…