Amplitude and temporal characteristics of the VEP in three groups of subjects

AL is the latent period, A is the amplitude of the N2 and P3 components registered in the right (d) and left (s) hemispheres.

Inter-hemispheric asymmetry SCP is a factor that exerts a single-type effect on the amplitude of the P3 components registered in both the right and left hemispheres. The components of the P3 PEP occur in the cortex of the brain in response to afferentation coming in by nonspecific polysynaptic visual systems. Their amplitude is determined by the functional activity of the cortex and limbic-reticulo-cortical structures. The revealed relationship between energy metabolism in the hemispheres and the SGP cannot be associated with the actual cortical processes, since in the latter case the asymmetry of the energy exchange would correlate with the asymmetry of the characteristics of the SGP.The same type of interconnection of increasing energy metabolism in one of the hemispheres and the amplitude of the components of the VIZ in both hemispheres can be explained only by the presence of a selective connection of the hemispheres with nonspecific brain systems, as formulated in the TA hypothesis. Dobrokhotova and N.N. Bragina (1977). Data on the relationship between interhemispheric asymmetry of energy processes and the amplitude of the late component P3 in both hemispheres suggest the dependence of interhemispheric asymmetry on the level of nonspecific brain activation.

local_offerevent_note May 25, 2019

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