Pterygoid Process

Description

Pterygoid process of the sphenoid anchors the posterior limit of the pterygopalatine region, with the medial pterygoid plate positioned medial to the broader lateral plate and both projecting inferiorly from the body of the sphenoid. At the inferior end of the medial plate, the pterygoid hamulus curves posterolaterally as a hook-like spur, separated from the lateral plate by the pterygoid fossa. Superiorly, the roots of the plates converge toward the sphenoid body, where adjacent landmarks typically include the scaphoid fossa and the opening of the pterygoid (Vidian) canal on the anterior surface. The bony contours are the point. Muscle and fascial attachments concentrate along these plates, so the image reads as an origin map: the medial pterygoid takes origin from the medial surface of the lateral pterygoid plate and the pterygoid fossa, while the lateral pterygoid arises from the lateral surface of the lateral plate and the infratemporal surface of the sphenoid. The hamulus acts as a pulley for the tendon of tensor veli palatini as it turns medially into the soft palate, a relationship that explains hamular bursitis and post-tonsillectomy or post-dental pain patterns, and it also matters during cleft palate repair or hamulotomy when altered tendon mechanics can affect Eustachian tube function. Fracture involvement of the pterygoid plates is a defining feature in Le Fort patterns and often flags a higher-energy midface injury. Maxillofacial anatomy teaching, dental curricula, and skull base surgical planning all benefit from this focused illustration, including lectures on masticatory muscle biomechanics, pterygopalatine fossa orientation, and endoscopic approaches that use the pterygoid canal as a landmark to the petrous internal carotid artery. It also suits radiology atlases that correlate CT bone windows with the hamulus and pterygoid plate margins in trauma and sinonasal disease. Anatomical accuracy verified by SciePro's Medical Advisory Board.