[Interhemispheric asymmetry of the motor representation of the facial musculature in the neocortex of the white mouse].

In anesthetized white mice, the motor representation of the face muscles was determined with the aid of intracortical microstimulation in the frontal neocortex (fields 4, 6, 8). Significant difference was found in the motor responses to low-threshold stimulation in left and right hemispheres. Stimulation of the left hemisphere induced mostly movements of the upper lip and vibrissae, whereas stimulation of symmetrical area in the right hemisphere induced more variable movements. The area of the lip movement was much smaller in the right hemisphere.