[Bioelectric activity of the brain in the acute and convalescent periods of tick-borne encephalitis in children].

The bioelectrical activity of the brain was studied in 86 children in the acute period of tick-borne encephalitis and during convalescence. A total of 183 electroencephalograms were analyzed, predominantly in the subclinical form of the disease (153). The acute stage was characterized by impairments in the bioelectrical activity of the brain in children of all age groups. The severity of the disorders and the form of the disease were closely correlated both according to the data of the baseline EEG and the findings of the functional tests. The changes were mostly manifest in a lowered threshold of cerebral excitability and, consequently, in increased convulsive readiness. In the course of the follow-up (2-3 years) these changes leveled off.