Neurophysiological Mechanisms of Regulation of Sensomotor Reactions of Differentiation in Onthogenesis

The amplitude-frequency characteristics of the late and early components of brain- evoked potentials (EP) and the speed of motor (MK), central (central information processing (CIP) and sensory (SC) component of the reaction of choice 2 from 3 stimuli (RC2-3), presented in mode go/nogo/gо investigated in children, teenagers and young people. It was found that the formation of sensorimotor reactions of differentiation in children, teenagers and young people is characterized by a gradual decrease in the quantities of mistakes and time of RC2-3, MK, SC, CIP, also latency and an increase in amplitude the evoked potential (ЕP). In children was invented simultaneous activation of the early (N1, Р1, N2, Р2) and deactivation of late (Р3) ЕP of the cerebral cortex and significant more mistakes and lower speed of RC2-3, MC, SC, CIP which indicates the presence of cortical-subcortical dysfunction of the sensor-motor system. In young people high speed of RC2-3, MC, SC, CIP and a smaller quantities of mistakes coincided with short latencies and a high amplitude of inter- peak intervals N1-P2 and P2-N2 and Р300. The results testify the formation of neurophysiological mechanisms of sensory-motor differentiation reactions happens with participation, mainly, of the early (N1, P1, N2, P2) components of children whereas late components of the ЕP (P3) are more actively involved in young people.

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