Projections of the Eye and the Neck Region on the Anterior Suprasylvian Cerebral Cortex of the Cat

Abstract

Abstract The overlap between projections of visual, auditory, cutaneous and muscle afferents to the cerebral cortex of the anterior suprasylvian sulcus was studied in cats anesthetized with chloralose. The visual projections were found near the junction between the anterior and the middle suprasylvian sulcus. They overlapped in rostral direction with the auditory projection area in the lower bank of the anterior sulcus. The overlap was, however, not complete and large click potentials, but no response to a light flash, were recorded in the lower bank just caudal to the locus of the Group I muscle afferents. Low threshold cutaneous and high threshold muscle afferents from the neck projected to the anterior suprasylvian and ecto‐sylvian gyri and to the upper bank of the anterior suprasylvian sulcus. Low threshold rnuscle and cutaneous neck afferents projected to the postcruciate dimple. A hypothesis concerning the function of this cortical region is discussed.

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