Describe the origins and insertions of the masseter and temporalis muscles. What action do these muscles work synergistically to accomplish?
What will be an ideal response?
The masseter muscle is a thick, band-like muscle that has its origin on the zygomatic arch. It inserts on the angle and lateral surface of the ramus of the mandible. It covers much of the ramus of the mandible. The temporalis muscle is a fan-shaped, convergent muscle that has its origin on and spreads over the flat portion of the temporal bone. It inserts on the coronoid process of the mandible. These two muscles provide much of the force needed for elevating the mandible to bite and chew food.
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