Pterygoid Process Of The Sphenoid Bone, Anatomy

Description

Pterygoid process anatomy is centered on the paired medial and lateral pterygoid plates descending inferiorly from the junction of the sphenoid body and greater wing at the skull base. Between these plates, the pterygoid fossa forms a deep vertical cleft, with the lateral plate positioned posterolateral to the medial plate and providing a broad lateral surface for muscular attachment. Inferiorly, the medial plate terminates as the pterygoid hamulus, a hooklike projection that curves posterolaterally, while the superior aspect of the medial plate includes the scaphoid fossa near the root of the process. Adjacent skull base landmarks typically framed with this region include the posterior edge of the maxilla and the opening toward the pterygopalatine fossa, reinforcing how tightly packed the deep face is around the pterygoid plates. Surgeons and dentists care about this bony complex because it anchors the pterygoid musculature and defines corridors used in transnasal and transmaxillary approaches to the pterygopalatine fossa and infratemporal fossa, where the maxillary artery, pterygopalatine ganglion, and V2 branches are at risk. Fracture lines in Le Fort patterns often propagate through the pterygoid plates, so a crisp view of the plate margins and the depth of the pterygoid fossa supports teaching of midface instability and CT correlation. The hamulus is a small landmark with outsized consequences. Irritation around it can contribute to hamular bursitis and soft palate pain syndromes. Use this illustration in head and neck anatomy modules, dental occlusion and mastication teaching, and operative atlases covering endoscopic skull base surgery or infratemporal fossa exposure where the medial and lateral pterygoid plates define the working boundaries. It also fits radiology education on skull base fractures and surgical planning references that need reliable bony landmarks for navigation. Anatomical accuracy verified by SciePro's Medical Advisory Board.