Temporal fossa
The temporal fossa is a fossa (shallow depression) on the side of the skull bounded by the temporal lines and terminating below the level of the zygomatic arch. Clinical significance. The pterion is located in the temporal fossa, Clinically the pterion is an important area because it overlies the anterior division of the middle meningeal artery and vein. Trauma in this region can lead to an extradural haematoma, which can result in herniation of brain tissue and ischemia.