Abstract
In children, adolescents and young men, the amplitude-frequency characteristics of the evoked potentials (EP) of the brain and the speed and qualitative characteristics of the response to the choice of one of the three (RC1-3) signals were studied. It was found that the formation of sensorimotor reactions of choice in children, adolescents and young men is characterized by a gradual decrease in the number of errors and an increase in the speed of RC1-3, as well as a decrease in latencies and an increase in the amplitude of the P300 VP wave, which reach the highest level in 18-20 year olds.ISSN 2076-5835. Вісник Черкаського університету. 2022. №220Purpose. In this regard, the purpose of the research was to reveal age-related features of neurophysiological mechanisms of regulation of sensory-motor differentiation reactions and processing information in the RC1-3mode for children, teenagers and young people.Methods. Evoked brain activity investigated according to indicators ЕP and also investigatedspeed and qualitative characteristics of differentiation of visual information in the RC1-3 mode with using a set of instrumental examination methods in 27 children 8-9 years old, 40 teenagers 12-13 years old and young people18-20 years old.Results. In children, adolescents and young men, different neurophysiological mechanisms of regulation of information processing in the RC1-3 mode are established, which is confirmed by the presence of probable differences in the number of errors, reaction speed, and early and late amplitudefrequency characteristics of VP. In children 8-9 years old, simultaneous activation of early (N1, P1, N2, P2) and deactivation of late (P3) VPs of the cerebral cortex and probably a greater number of errors and a low speed of RC1-3 were found, which indicates the presence of cortical-subcortical dysfunction sensorimotor system. Adolescents 14-15 and young men 18-20 years old are characterized by a high speed of RC1-3 and a smaller number of errors, a higher amplitude of the interpeak intervals N1-P2 and P2-N2 and P300 and shorter latencies of the P3 wave of VP.Originality. Neurophysiological studies of VP P300 in children, adolescents and young men revealed that changes in the structural and functional organization of the cerebral cortex occur with age for the RC1-3 reaction.Conclusions. They are characterized by a transition from the involvement of diffuse activation of neuronal brain structures in children to their local organization in adolescents and young men
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