Anatomical Characteristics Of The Lateral Pterygoid Plate Of The Sphenoid Bone

Description

Lateral pterygoid plate of the sphenoid dominates this cranial base study as the broader, fin-like lamina of the pterygoid process, oriented inferiorly from the junction of the body and greater wing. Its lateral surface faces the infratemporal fossa and provides the bony wall medial to the mandibular ramus, while the medial surface bounds the pterygoid fossa adjacent to the medial pterygoid plate. Superiorly, the plate tapers toward the root of the pterygoid process near the foramina of the middle cranial fossa, and inferiorly it approaches the region where pterygoid musculature fills the pterygoid fossa. Bony relief matters here. For dental, maxillofacial, and skull base work, the lateral pterygoid plate is a practical landmark because it anchors the lateral pterygoid muscle on its lateral surface and contributes to the medial pterygoid’s origin from the pterygoid fossa, linking sphenoid morphology directly to mandibular excursion and temporomandibular joint mechanics. Hypertrophy or spasm of the pterygoids in TMD, post-traumatic malocclusion after midface fractures, and access corridors for infratemporal fossa surgery all benefit from a crisp sense of where this plate sits relative to the cranial base and adjacent spaces. The focused bony isolation helps separate the plate’s contours from the clutter of neighboring facial skeleton and makes the pterygoid process easier to interpret than in a full skull overview. Use this illustration in gross anatomy and head and neck modules to teach the sphenoid’s pterygoid process, in oral and maxillofacial surgery texts discussing infratemporal approaches, and in radiology education when correlating CT appearance of pterygoid plate fractures with masticatory muscle attachments. Anatomical accuracy verified by SciePro's Medical Advisory Board.