[Combined effects of various forms of motor deprivation and gamma irradiation on the higher nervous activity in rats].

Effects of gamma-radiation at a dose of 3 Gy against either antiorthostatic hypodynamia (AOH) or hypokinesia (HK) on formation of the differentiated motor-drinking reflex (DR) were compared. Each of the forms of motor deprivation hindered the elaboration of DR; gamma-irradiation aggravated these disorders. At the same time, AOH led to significantly more severe disturbances in the higher nervous activity including the generalized excitation, pathologic aggressiveness and neurotization of animals. In contrast, hypokinesia stimulated the active elements of behavior which inhibit the passive-defensive behavior and a fear reaction. Therefore, the modifying effect of irradiation becomes apparent only if combined with AOH.