| 释义 |
DictionarySeeauditoryEncyclopediaSeeinternal acoustic meatusinternal auditory meatus
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 meatusinternal auditory meatusThe 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 meatusSee also: meatus |