The masseter is one of the muscles of mastication. It is a powerful superficial quadrangular muscle originating from the zygomatic arch and inserts along the angle and lateral surface of the mandibular ramus. The masseter is primarily responsible for the elevation of the mandible and some protraction of the mandible.Click to see full answer. Then, what muscles protract the mandible? Preview Flashcards Front Back Which two muscles protact and elevate the mandible? The medial pterygoid and masseter both elevate and protract the mandible Which muscle is the prime mover of jaw closure? The masseter is the prime mover of jaw closure Furthermore, what muscles raise the mandible against the maxilla? the medial pterygoid raise the mandible against the maxilla with considerable force. The fourth pair of muscles, the lateral pterygoids, act to thrust the mandible forward. Correspondingly, what muscles close the jaw? There are three jaw-closing muscles (masseter, temporalis, and medial pterygoid) and two jaw-opening muscles (lateral pterygoid and digastric).What is retraction of the mandible?Besides being hilarious on her little face, it’s also a muscle action called mandible protraction, and all the superficial muscles of mastication are involved. Protraction (on the left) is the act of protrusion, or extending beyond the normal position. The opposing action is called retraction (on the right).
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