Petrosal fossula - Fossula petrosa



The petrosal fossula is a small depression in the bony ridge between the carotid canal and the jugular fossa, occupied by the tympanic ganglion of the glossopharyngeal nerve.

Text by Antoine Micheau, MD - Copyright IMAIOS

Anatomical hierarchy

General Anatomy > Bones; Skeletal system > Axial skeleton > Cranium > Temporal bone > Petrous part > Inferior surface of petrous part > Petrosal fossula