[The role of preference for acoustic and visual stimuli in the formation of behavior reactions in the gray rat].

Investigation of the behaviour of Lapunova grey rats (Norway rats selected for non-aggressiveness to humans) in experimental conditions of avoidance of closed space, at screams of an other rat, and of elaboration, extinction and reversal of differentiation conditioned reflexes to discrimination of geometric figures, revealed a rather high importance of acoustic and visual stimuli in the process of formation of behaviour strategy in these animals. Rats behaviour was characterized by an easy transition from spatial to acoustic and visual stimuli in the process of adaptation to new surroundings and by a low level of spatial-motor asymmetry.