ЭЭГ активность мозга, предшествующая спонтанному восстановлению психомоторной деятельности после эпизодов микросна

Abstract

In experiments with daytime sleep, according to data obtained from 23 subjects, changes in the spectral characteristics of the EEG in the period preceding the moment of awakening, which was recorded to restore the psychomotor test, were studied. During one short experiment, it can be used to investigate several consecutive episodes: the disappearance of conscious cognitive activity when falling asleep and its resumption upon spontaneous awakening. The study of the characteristics of the EEG before awakening is important for assessing the transients of the sleep-wake cycle, determining the degree of recovery of psychomotor activity upon awakening and the level of the accompanying consciousness. It is shown that the alpha activation observed upon awakening is often preceded by the appearance of K-complexes, of varying degrees of severity, on which low-frequency alpha oscillations are superimposed, which can be regarded as slow sigma spindles. This pattern most likely reflects the action of a universal thalamocortical activating mechanism, the same for both night and daytime sleep, regardless of whether it follows a short-term activation followed by sleep or further begins a cognitive activity.