The Anatomy Of The Pterygoid Process Of The Sphenoid Bone

Description

Rising inferiorly from the junction of the sphenoid body and greater wing, the pterygoid process descends as two laminae, the medial and lateral pterygoid plates, separated by the pterygoid fossa. The sequence rotates the skull base to clarify how the medial plate sits medial to the fossa and terminates in the pterygoid hamulus, while the broader lateral plate forms the lateral wall of the fossa. As the camera tracks inferiorly, the scaphoid fossa at the root of the medial plate and the posterior edge of the plates come into profile. Orientation is the lesson. Anatomically, this is the attachment hub for the muscles that drive mandibular elevation and excursions: medial pterygoid from the medial surface of the lateral plate and pterygoid fossa, and lateral pterygoid from the lateral surface of the lateral plate and adjacent infratemporal surface of the sphenoid. The animation makes it easier to understand the three-dimensional corridor behind the maxilla where the pterygoid plates relate to the infratemporal fossa laterally and the nasopharyngeal region medially, a relationship that becomes clinically relevant when interpreting skull base fractures or planning approaches that traverse the pterygomaxillary region. Seeing the plates rotate against adjacent cranial base contours helps explain why pterygoid plate fractures are a common marker in Le Fort midface injury patterns. Use this asset in head and neck anatomy teaching (skull base and muscles of mastication), in oral and maxillofacial surgery education when discussing access around the maxillary tuberosity and pterygomaxillary junction, or in radiology training to map CT bony landmarks of the sphenoid. Anatomical accuracy verified by SciePro's Medical Advisory Board.