Internal acoustic meatus
In humans, the internal acoustic meatus is about 1-2 cm in length. Aside from the vestibular nerve (responsible for balance) and cochlear nerve (responsible for hearing), the facial nerve also runs through this canal.
The canal opens to the inside of the cranial cavity, near the center of the posterior surface of the temporal bone, and the opening is called internal acoustic opening. At the other end of the canal are the openings for the vestibulocochlear nerve and facial nerve.