[Role of genetic factors in the formation of trace reactions in man].

Trace processes due to presentation of visual nonverbal information, and the dynamics of the bioelectrical parameter (mean level of asymmetry of EEG-waves) were studies in 32 pairs of monozygote and 38 pairs of dizygote twins with twins method. Statistical processing of the data revealed a significant effect of genetic factors on the formation of individual variability of the characteristics of trace processes in humans. The results obtained showed that with increased functional load the intrapair similarity of trace reactions increased in monozygote twins and did not change or decrease in dizygote twins and in unrelated pairs. This fact is interpreted at a dependence of appearance of geneticly determined neurophysiological characteristics on the level of functional activity of the nervous system.