Skip to Content
Medical Term:

foramen petrosum


an occasional opening in the greater wing of the sphenoid bone, between the foramen spinosum and foramen ovale, which transmits the lesser petrosal nerve.

Synonym(s): canaliculus innominatus, foramen of Arnold, petrosal foramen

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