SPECTRAL-CORRELATIVE ANALYSIS OF THE RABB ITS ELECTRICAL BRAIN ACTIVITY AT EXTINCTION OF ENDOGENOUS ALIMENTARY CONDITIONED-RESPONSE

Spectral analysis of electrical activity showed that at the end of ext inction of the alimentary conditioned responses, elaborated on the bas is of the hunger dominant, the spectral density of electrical activity of the cortical centre of the goal-directed reaction (blinking) of th e trained eye and that of the lateral preoptic area, lateral hypothala mus, and ventromedial hypothalamus raised in the delta-band. To the en d of the extinction the coherence (Cog) of biopotentials of the cortic al centres of blinking of both eyes. and electrical activity of the ve ntro-medial hypothalamus and medial preoptic area was changed in diffe rent directions. After the extinction of the goal-directed reaction Co g between biopotentials of the lateral hypothalamus and the electrical activity of the frontal cortex raised in the delta-band and Cog betwe en the activity of the lateral hypothalamus and that of the cortical c entres of blinking of both eyes lowered. The level of excitation of th e structures included in the dominant constellation was suggested to r aise to the end of the extinction of the endogenous conditioned respon se.