Upper head: infratemporal surface of sphenoid bone. Lower head: lateral surface of lateral pterygoid plate
Pterygoid fovea below condyloid process of mandible and intra-articular cartilage of temporomandibular joint
Depresses and protracts mandible to open mouth. Pulls forward cartilage of joint during opening of mouth. Aids in chewing.
Nerves to lateral pterygoid (anterior division of mandibular nerve (V))