الثلاثاء، 27 نوفمبر 2012

Overview

This article discusses the anatomy of the auditory pathway (see the following images), as well as a few physiologic considerations and clinical applications.
Illustration of the auditory reflex pathway. Illustration of the auditory reflex pathway. Illustration of the conscious auditory pathway. Illustration of the conscious auditory pathway. Anatomy of the auditory system. Courtesy of Hamid R Djalilian, MD. The eighth cranial nerve (CN VIII) or vestibulocochlear nerve is composed of 2 different sets of fibers: (1) the cochlear nerve and (2) the vestibular nerve. These 2 nerves are anatomically and physiologically different. The peripheral segments of the cochlear and vestibular nerves join at the lateral part of the internal auditory canal (IAC) to form the vestibulocochlear nerve. They are also joined by the facial nerve in the IAC. The length of the vestibulocochlear nerve, from the glial-Schwann junction to the brainstem, is 10-13 mm in the human male and 7-10 mm in females.

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