IV.B.4 Head: CN III Page 2 of 2

These fibers pass through the posterior fossa and enter the petrous portion of the temporal bone via the internal acoustic meatus.

	What other structures enter the internal acoustic meatus?
Facial nerve CN VII, labarynthine artery and vein.
	Predict the clinical findings of injury to the vestibulocochlear nerve.
Cranial nerve lesions Cranial Nerve Clinical Findings Example of Lesion Vestibulocochlear nerve [VIII] Progressive unilateral hearling loss and tinnitus (ringing in the ear) Tumor at the cerebellopontine angle

Predict the most likely locations for injury to cranial nerve VIII.