THE TOPOGRAPHICAL PROJECTION FROM THE VENTRAL LATERAL GENICULATE NUCLEUS TO THE SUPERIOR COLLICULUS AND PRETECTUM IN THE CAT / 解剖学报

ABSTRACT

The present investigation was performed on six adult cats. The morphology and distribution of the labeled cells in the ventral lateral geniculate nucleus (LGNv) were observed. Following the injection of horseradish peroxidase (HRP) into the deeper layers of the superior colliculus the labeled cells were found to concentrate ipsilaterally in the ventral part of the rostromedial division of the LGNv. The HRP-positive cells were composed of large-sized, smaller, round and oval ceils. In the cases of injection of HRP into the rostral pretectum, the HRP-positive cells were seen bilaterally in the caudolateral division of LGNv mainly in the contralateral part, while the labeled cells were found ipsilaterally in the ventral part of caudolateral division after injection of HRP into the caudal pretectum. These cells were smaller than that large ones of superior colliculus injection. The results indicate that the projection of the LGNv to the superior colliculus and pretectum is organized topographically.