[Behavioral and electrophysiologic reactions during transformation of heterogeneous conditioned reflexes].

A successive transformation of the signal meaning (defensive to alimentary), first of situational stimuli and then of phasic (triggering) conditioned stimulus (clicks), was performed on dogs with elaborated defensive motor reflexes. In the course of the transformation, a new kind of behaviour is formed due to an interaction of tonic and phasic stimuli; it is manifested in a complex of somatic, vegetative and bioelectrical reactions to the action of the conditioned stimulus and during intersignal periods. The heterogenous defensive alimentary meaning of clicks is reflected in EPs of the auditory and somatosensory cortical areas, primarily in differences in the amplitude of the second positive oscillation.