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  • Title: Calcium concentration in cochlear endolymph after vestibular labyrinth injury.
    Author: Ikeda R, Nakaya K, Oshima T, Kawase T, Kobayashi T.
    Journal: Neuroreport; 2010 Jun 23; 21(9):651-5. PubMed ID: 20535852.
    Abstract:
    The endolymphatic calcium concentration [Ca2+] is essential for acoustic transduction. This study investigated the changes in cochlear function caused by vestibular labyrinth destruction in the acute phase by measurement of the endocochlear potential and endolymphatic [Ca2+].Hartley guinea pigs underwent lateral semicircular canal transection with suctioning of the perilymph, ampullectomy, or destruction of the lateral part of the vestibule. The endocochlear potential and endolymphatic [Ca2+] showed mild change after lateral semicircular canal transection with suctioning or ampullectomy. However, the endocochlear potential decreased drastically and permanently, and the endolymphatic [Ca2+] elevated suddenly but finally normalized after vestibulotomy. Elevated endolymphatic [Ca2+] is important in the disturbance of the mechanism of cochlear function caused by vestibular labyrinth destruction.
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