The contralateral impairment of the orienting ocular-following reflex after lesions of the lateral suprasylvian cortex in cats

Abstract

The cortex of the middle suprasylvian sulcus was removed unilaterally in cats with brain stem transected at the pretrigeminal level. The vertical following reflex was evoked by a slit of light (l degrees × 4 degrees) moving along the vertical meridian or parallel to it up to 40 degrees in the left or right hemifield. The reflexes from the contralateral hemifield were greatly reduced. This contrasts with previous reports with perimetry test where authors made smaller lesions.