COHERENT ANALYSIS OF NEOCORTICAL ELECTRIC AL-ACTIVITY AT DISCONTINUATION OF THIRST DOMINANT

During learning of an animal to goal-directed discontinuation of the t hirst dominant, the stable temporary connection established between th e center where the dominant focus has been created and the center rela ted to the goal-directed blinking reaction. Study of the spatio-tempor al relations of neocortical biopotentials in rabbits learned to goal-d irected behaviour showed that in the motivation state of thirst induce d by water deprivation the level of coherence of the electrical activi ty in the low-frequency range increased between the frontal cortex (th e swallowing center) and the blinking cortical center. The observed ch anges testify to the readiness of certain structures of the dominant c onstellation for realization of the temporary connection. Analysis of the EEG recorded in three successive 5-sec intervals which preceded bl inking revealed a certain dynamics of changes in coherent characterist ics. These findings reflect a functional ambiguity and phase course of the processes which accompany preparation for a goal-directed reactio n. The blinking reaction occurs at the background of increasing correl ation between electrical processes in symmetrical points of the cortic al blinking center in the right and left hemispheres.