SPECTRAL-CORRELATIVE CHARACTERISTICS OF ELECTRICAL-ACTIVITY OF RABBIT BRAIN IN A STATE OF CALM ALERTNESS

Abstract

Inter- and intrahemispheric relations of electrical activity of the promotor, sensorimotor (representation of forelimb and blinking) and visual zones of rabbit''s cerebral cortex in calm alertness was studied by method of spectral-correlative analysis. Mean coherence levels of the EEG of tested hemispheric symmetric points and symmetric pairs of leads in the left and right hemispheres were characterized by a high temporal stability in the state of calm alertness and during sensory stimulation. A comparison of mean coherence values of EEG in symmetric leads, revealed a tendency to left-side dominance of statistical bonds of electrical processes. A tendency was shown towards interhemispheric asymmetry by mean parameters of EEG power spectra: the left hemisphere of the rabbit is characterized by a lower mean frequency of electrical activity and a more narrow effective frequency of the spectrum.