Medial view of a canine brain. Cingulate gyrus gray matter has been removed, exposing white matter (3) dorsal to the corpus callosum. The lamina terminalis (colored red), which was the rostral end of the neural tube, forms rostral wall of the third venbricle (32). The rostral commissure is located in the wall of the lamina terminalis. Fibers in the rostal commissure connect right and left rhinencephalic components.