[The interaction in the motor cortex of 2 foci of a "polarization" dominant].

The effect of sequential applications of the weak anode DC (0.5-3 mcA) to the areas of fore- and hindlimb representation in the motor cortex was studied in waking unrestrained rabbits. This procedure formed two excitation foci with the dominant properties, i.e., different afferent stimuli (sound, light) produced the dominant behavioral reaction (limb movement). The cooperative inhibition of the dominant foci was observed in the process of formation of the second focus in different time intervals. The second focus inhibited the primary focus for a rather long-term period, and then the mutual inhibition of the foci acquired the reciprocal character. The obtained results testify to excitation redistribution in the motor cortex during the action of weak anode DC on the motor cortex.