Ventrolateral view of sheep brain following removal of the caudal portion of the left cerebral hemisphere. The
oculomotor nerve (bottom) and
trochlear nerve (top) are encircled by red thread. (The trochlear nerve emerges from the dorsal surface of the brainstem.) The
rostral colliculus of the midbrain is labeled 4. For a lateral view of the midbrain, click
here.
Some diencephalic structures are labeled: optic chiasm (1), optic tract (2), and lateral geniculate body (3). Also, the medical geniculate body is marked with a small red square.