Purpose of work: to evaluate the reactivity of the spectral density of electroencephalogram theta rhythm power in military seafarers of the submarine fleet during the sanatorium-resort rehabilitation.Materials and methods: on the first and 20th day of the sanatorium-resort rehabilitation on the basis of the Crimean Sanatorium-Resort Complex and Sudak Health Center, the background activity of the electroencephalogram (EEG) was recorded with closed eyes and when performing a cognitive task in 60 seafarer divers.Results: analysis of variance showed significant changes in the spectral power of the EEG theta rhythm density in all experimental situations studied. In conditions of relative rest, the changes were expressed mainly in a decrease in the theta rhythm power. At the same time, when performing a cognitive task, multidirectional changes in the spectral density of the theta rhythm power were noted: an increase in the fronto-parietal direction of the predominantly left hemisphere and a decrease in other regions of the cerebral cortex.
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