The medial pterygoid a synergist of the temporalis and masseter in elevating the mandible. Its insertion is the medial surface of the mandible near its angle. This muscle originates from the medial surface of the lateral pterygoid plate of the sphenoid bone, the maxilla, and the palatine bone. You can initially locate it from this view but dissect away the lateral pterygoid to more fully expose it. medial pterygoid - Deeper still is the medial pterygoid.The lateral pterygoid protrudes the mandible (pulls it anteriorly) and provides forward sliding and side-to-side grinding movements of the lower teeth. Its insertion is the condyle of the mandible and capsule of the temporomandibular joint. This deep, two-headed muscle originates at the greater wing and lateral pterygoid plate of the sphenoid bone (hence its name). Dissect it away and then relocate the right lateral pterygoid (both inferior and superior heads). ![]() As you can see the ramus of the mandible is obscuring some of your view.
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