vestibulocochlear nerve

vestibulocochlear nerve

also called  Auditory Nerve, Acoustic Nerve, or Eighth Cranial Nerve,  

      nerve in the human ear, serving the organs of equilibrium and of hearing. It consists of two anatomically and functionally distinct parts: the cochlear nerve, distributed to the hearing organ, and the vestibular nerve, distributed to the organ of equilibrium.

      The cochlear nerve fibres end in terminals around the bases of the inner and outer hair cells of the organ of Corti and begin in groups of nerve cells—dorsal and ventral cochlear nuclei—located at the base of the brain at the juncture of the pons and the medulla oblongata. The vestibular portion of the vestibulocochlear nerve originates in a group of nerve cells called the vestibular ganglion, in the internal acoustic meatus, a channel in the temporal bone through which the facial and auditory nerves and some blood vessels run. The sensory endings of this portion of the nerve are in the semicircular canal and in the utricle and saccule, the structures of the inner ear responsible for the sensation of equilibrium.

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Universalium. 2010.

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Look at other dictionaries:

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  • Vestibulocochlear nerve — A nerve that is responsible for the sense of hearing and which is also pertinent to balance, to the body position sense. Problems with the vestibulocochlear nerve may result in deafness, tinnitus (ringing or noise in the ears), dizziness, vertigo …   Medical dictionary

  • vestibulocochlear nerve — noun a composite sensory nerve supplying the hair cells of the vestibular organ and the hair cells of the cochlea • Syn: ↑acoustic nerve, ↑auditory nerve, ↑nervus vestibulocochlearis, ↑eighth cranial nerve • Hypernyms: ↑cranial nerve • …   Useful english dictionary

  • vestibulocochlear nerve — the eighth cranial nerve (VIII), responsible for carrying sensory impulses from the inner ear to the brain. It has two branches, the vestibular nerve and the cochlear nerve …   The new mediacal dictionary

  • vestibulocochlear nerve — noun Date: 1962 auditory nerve …   New Collegiate Dictionary

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  • vestibulocochlear nuclei — nuclei of vestibulocochlear nerve the vestibular and cochlear nuclei considered together; see nuclei vestibulares and nuclei cochleares …   Medical dictionary

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