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tympanic cavity


Definition: an air chamber in the temporal bone, medial to the tympanic membrane, between the external acoustic meatus and the inner ear containing the ossicles; it is lined with mucous membrane continuous with the pharyngotympanic tube anteriorly and the tympanic antrum and mastoid air cells posteriorly and bound by the tympanic membrane laterally.

Synonym(s): cavitas tympaniTA, cavity of middle ear, cavum tympani

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.