INFLUENCE OF LESIONS IN SUBCORTICAL-PATHW AYS ON ELECTRICAL-ACTIVITY OF BRAIN CORTEX

Simultaneous consideration of EEG, neurological, and imaging data obta ined with sequelae of ischemic stroke during rehabilitation allowed us to verify the organic nature of some EEG phenomena. It was shown that stroke-induced impaired circulation in the area of the middle brain a rtery gave rise to deviant local cortical electrical activity (EA) in the form of polymorphic theta and delta waves or groups of theta waves . The character of such activity depended on the lesion size and exten t of blood supply deficit in the damaged area. Decrease in the lesion size and restoration of blood supply during rehabilitation were accomp anied by changes in the local deviant EA, the polymorphic slow-wave ac tivity was replaced by single alpha and theta sharp waves, The restora tion of motor functions was less successful in cases with the local de viant EA localized in the caudal part of the cortex.