SPECTRAL CHARACTERISTICS OF RABBITS NEOCORTICAL BIOPOTENTIALS AT CESSATION OF THIRST DOMINANT

Spectral analysis of neocortical electrical activity of rabbits during learning blinking reaction which was directed to cessation of thirst dominant, revealed significant increase of the, spectral power most pr onounced and regular in the delta-range. On the basis of these data a conclusion is drawn that during the goal-directed behaviour of the ani mal the cortical structures are involved in the dominant constellation . Comparison of the spectral characteristics of potentials recorded in three successive 5-second intervals which preceded blinking, revealed a certain specificity (temporal and related to different frequency ra nges) of changes in electrical activity in different cortex areas. The se findings reflected functional ambiguity and phase course of the pro cesses which accompany preparation for the goal-directed reaction.