Vestibulocochlear Nerve(VIII). Dr. Nimir Dr. Safaa. Objectives Describe the structures making the external and middle ear. Discuss the features of the tympanic membrane. Describe the ossicles and related muscles. Describe the auditory tube, its openings and structure.
Ascending fibers also pass upward from vestibularnuclei to cerebral cortex, to vestibular area in postcentralgyrusjust above lateral fissure.
Axons pass through posterior part of pons and midbrain form lateral lemniscuswhich consists of third-order neurons from both sides.