It is vertical, and descends at right angles from the medial end of the inferior orbital fissure.

It is a triangular interval, formed by the divergence of the maxilla from the pterygoid process of the sphenoid.

It connects the infratemporal with the pterygopalatine fossa, and transmits the terminal part of the maxillary artery.

The pterygopalatine plates are separated laterally from the posterior surface of the body of the maxilla by the pterygomaxillary fissure.

This article incorporates text in the public domain from page 185 of the 20th edition of Gray's Anatomy (1918)