Origin and Insertion
The upper/superior head originates on the infratemporal surface and infratemporal crest of the greater wing of the sphenoid bone, and the lower/inferior head on the lateral surface of the lateral pterygoid plate.
Inferior head inserts onto the neck of condyle of the mandible; upper/superior head inserts onto the articular disc and fibrous capsule of the TMJ.
Read more about this topic: Lateral Pterygoid Muscle
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