The effects of the removal of the somatosensory areas I and II on left leg-right leg differentiation to tactile stimuli in dogs.

Dogs were trained to lift the right forelegs to a rhythmic tactile stimulus applied to the right side of the trunk, and to lift the left forelegs to a tactile stimulus applied to the left side of the trunk. After training was completed various ablations of sensory I area and sensory II area were made. It was found that the task was impaired after unilateral or bilateral SII lesions, but was virtually preserved after SI lesions.