internal auditory canal


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internal auditory canal

n.
A canal running through the petrous portion of the temporal bone, giving passage to the facial and vestibulocochlear nerves.

internal auditory canal

The tunnel in the petrous portion of the temporal bone through which the vestibulocochlear and facial nerves exit the cranial cavity.
Synonym: meatus acusticus internus
See also: canal
References in periodicals archive ?
In conclusion, patients with a large petrous apex cholesterol granuloma may experience extensive bone erosion involving the jugular foramen, carotid canal, and internal auditory canal.
Schwannomas in the internal auditory canal usually arise from the vestibular segment of the VIIIth cranial nerve.
7-mm mass located in the right internal auditory canal (IAC) that appeared hypointense on T 1-weighted images and isointense on T2-weighted images; the tumor showed no dural tail sign or calcification on MRI (figure).
Osteomas occur in all parts of the temporal bone, including the EAC, mastoid and squamous portions, zygomatic process, glenoid fossa, middle ear, eustachian tube, petrous apex, internal auditory canal, and styloid process.
In 1998, a group from Japan reported the first case of an angiolipoma in the internal auditory canal.
A decrease in cerebrospinal fluid pressure may result in an endolymphatic hydrops through a patent cochlear aqueduct or through the fundus of the internal auditory canal.

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