Midsaggital View of Dissected Brainstem, Cerebellum, and Cerebrum. The body of the fornix can be seen splitting into the pre- and post-commissural fornix as it passes anterior and posterior to the anterior commissure, respectively. The corpus callosum genu, body, and splenium have been highlighted. The red nucleus can be seen posterior to the mammillary body. The anterior and posterior lobe of the cerebellum, separated by the primary fissure, are demonstrated.  (Image courtesy of M Nunez)