[Compression spectral analysis of the EEG of patients with occlusive diseases of the main vessels of the head].

The authors have examined 37 patients with occlusive lesions of the main vessels of the head using electroencephalogram and compression spectral analysis of the EEG findings. A group of patients with the predominant damage to the carotid and vertebral arteries has been identified on the basis of angiographic data. It has been shown that alterations in the bioelectrical activity of the brain are determined by hemodynamic disturbances in patients with transient disorders of the cerebral circulation and circulatory encephalopathy. In patients with acute impairments of the cerebral circulation, the nature of the EEG and spectrogram depends primarily on localization of the ischemic focus. The quantitative parameters of changes in the bioelectrical activity of the brain in different groups of patients are outlined.