[Peculiarities of changes in the EEG in the development of coma in patients with a focal injury of the brain].

A number of new electrographic variants reflecting the specifity distinguishing the evolution of coma in focal affections of the brain and clearly correlating with its clinical manifestations were elicited. The comatose status, apart from a fall of the level and frequency of the brain biopotentials, is shown to be characterized by an imbalance of spatial and temporal relations in the cortex of the large hemispheres, a correlation between the degree of disrupted inter-central relations and the stage marking the development of the comatose process having been disclosed. Some EEG findings were obtained that may be taken advantage of in judging about the prognosis as to the evolution of coma. An electroencephalographic investigation of the comatose states in focal lesions of the brain opens up the possibilities for a differential approach to the study of coma.