115. Brainstem 116. Fourth Ventricle and Cerebellum 117. Cranial Nerve Nuclei in Brainstem: Schema 118. Cranial Nerve Nuclei in Brainstem: Schema (continued) 119. Cranial Nerves (Motor and Sensory Distribution): Schema 120. Olfactory Nerve (I): Schema 121. Optic Nerve (II) (Visual Pathway): Schema 122. Oculomotor (III), Trochlear (IV), and Abducent (VI) Nerves: Schema 123. Trigeminal Nerve (V): Schema