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Medical Term:

petrosal fossula


a small and often only faintly marked depression on the inferior surface of the petrous portion of the temporal bone, between the jugular fossa and the opening of the carotid canal; here opens the canaliculus tympanicus transmitting the tympanic nerve.

Synonym(s): fossula petrosaTA, petrosal fossa, receptaculum ganglii petrosi

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.