INFLUENCE OF MEDIAL GENICULATE STIMULATIO N ON MOTOR POLARIZATION DOMINANT IN RABBITS

We studied the influence of stimulation of the medial geniculate body (MGB) on the course and recovery of the motor polarization dominant cr eated by the action of DC anode on the rabbit's right sensorimotor cor tex. Electrical activity of the sensorimotor cortex and MGB was record ed in both cerebral hemispheres as well as mechanograms of both the fo relimbs. It was shown that MGB stimulation at the background of the do minant optimum reinforced it eliciting a movement of the <<dominant>> forelimb. During geniculate stimulation spectral power of the electric al activity of both the structures of the right hemisphere increased i n the delta-1 range. Coherence spectra displayed an increase of the me an coherence level in the same delta-1 range. These phenomena were cha racteristic for the dominant state. On the next after exposure of the cortex to DC, the dominant recovered after application of 7-10 trials of geniculate stimulation.