Human orienting reaction: the role of genetic and environmental factors in the variability of evoked potentials and autonomic components.
The effect of genetic and environmental factors on interindividual differences in GSR, heart rate and EP components of orienting reaction to neutral acoustical stimulus and to the same stimulus at a very high intensity was analysed in 22 pairs of monozygotic and 21 pairs of dizygotic twins. Genetic factors appeared to be important for the variability of all GSR characteristics, N100 and P180 EP amplitudes, magnitude of the HR response to the strong stimulus and HR habituation to the weak stimulus. Environmental factors influenced greatly the variances of late EP components but only in response to the weak stimulus. Different role of genetic and environmental factors in motivation and cognitive components of orienting reaction points to the involvement of several relatively independent functional systems in it.
Kotchoubei
B I
BI
Institute of General and Pedagogical Psychology, USSR Academy of Pedagogical Sciences, Moscow.
D000293:Adolescent; D000328:Adult; D001341:Autonomic Nervous System / Q000502:physiology*; D004777:Environment; D005072:Evoked Potentials, Auditory; D005712:Galvanic Skin Response; D005824:Genetics, Behavioral; D006339:Heart Rate; D006801:Humans; D009949:Orientation / Q000502:physiology*; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic