[Effect of stimulation of structures causing an escape reaction on the self stimulation reaction in rats].

The effect of emotionally negative actions with various intensities, on the activity of the positively reinforcing brain system was studied in chronic experiments on rats. In each rat "purely" negative and positive sites were determined by well-known methods of pedal self-stimulation, of reactions of active and passive avoidance. It was shown that elimination of both central and peripheral negative actions enhances the activity of the positive reinforcement system; complex neurophysiological relations exist between systems of positive and negative reinforcement which cannot be defined solely as a reciprocal interaction.