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subarcuate fossa


Definition: an irregular depression on the posterior surface of the petrous portion of the temporal bone just below its crest and above and lateral to the internal acoustic meatus. In the fetus, the flocculus of the cerebellum rests here; in the adult, a small vein enters the bone here.

Synonym(s): fossa subarcuataTA, floccular fossa, hiatus subarcuatus

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