meatus acusticus internus

in·ter·nal a·cous·tic me·a·tus

[TA]

a canal beginning at the opening of the internal acoustic meatus in the posterior cranial fossa, passing laterally through the petrous portion of the temporal bone to end at the fundus, where a thin plate of bone separates it from the vestibule; it gives passage to the facial and vestibulocochlear nerves together with the labyrinthine artery and veins.

Synonym(s): meatus acusticus internus [TA], internal auditory meatus

Farlex Partner Medical Dictionary © Farlex 2012

meatus

(me-a'tus) plural.meatus [L.]

A passageway or an opening. meatal (me-a'tal), adjective

acoustic meatus

The opening to either the external or internal auditory canal. It can also be a synonym for either the external or internal auditory canal.

meatus acusticus externus

External auditory canal.

meatus acusticus internus

Internal auditory canal.

external acoustic meatus

External auditory meatus.

external auditory meatus

The outer opening of the external auditory canal, or the canal itself.

See: external acoustic meatus.

internal acoustic meatus

Internal auditory meatus.

internal auditory meatus

The opening of the internal auditory canal into the cranial cavity located on the posterior surface of the petrous portion of the temporal bone, or the canal itself.

Synonym: internal acoustic meatus

meatus nasi communis

Common nasal cavity on either side of septum, into which three meatus open.

meatus nasi inferior

Space beneath inferior turbinate or concha of the nose.

meatus nasi medius

Space beneath middle turbinate or concha of the nose.

meatus nasi superior

Space beneath superior turbinate or concha of the nose.

meatus nasopharyngeus

Posterior portion of nasal cavity, which communicates with the nasopharynx.

urethral meatus

External opening of the urethra.

Synonym: urinary meatus; meatus urinarius

meatus urinarius

Urethral meatus.

urinary meatus

Urethral meatus.

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