[EEG diagnostic potential in the estimation of the severity and sequelae of ischemic stroke]

Simultaneous consideration of both electroencephalographic and neurologic data as well as the results of both computer and emission computer tomography in patients with consequences of ischemic stroke during a process of neurorehabilitation gave chance for more accurate definition of organic origin of some EEG phenomena. It was found that a damage of the conductive pathways between the cortex and subcortical structures associated with disorders of blood circulation in the area of the middle cerebral artery was accompanied by local disorders in electric activity of the cortex mainly in form of polymorphic waves of theta- and delta-ranges and groups of theta-waves. Besides, a character of the slow waves depended on the size of the damage and on the degree of a decrease of blood circulation in the area of the damage. A decrease of the damage focus and improvement of circulation during restoration process was accompanied by changes in local deviations in cortical electric activity: polymorphic slow waves activity was replaced by sharp waves of alpha- and theta-ranges. Location of the changes of electric activity in caudal regions of the cortex is an unfavourable prognostic sign for restoration of motor activity in patients with ischemic stroke.