INBDE (Integrated National Board Dental Examination) Practice Exam

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Where does the masseter muscle insert?

  1. lateral surface of mandible

  2. lateral surface of ramus

  3. medial surface of ramus

  4. anterior surface of mandible

The correct answer is: lateral surface of ramus

The masseter muscle is a powerful muscle of mastication that originates from the zygomatic arch and inserts into the lateral surface of the ramus of the mandible. Its main functions include elevating the mandible during closing of the jaw and assisting in the side-to-side movement of the mandible during chewing. Option A is incorrect because the masseter muscle does not insert on the lateral surface of the mandible, but rather originates from it. Option C is incorrect because the masseter muscle does not insert on the medial surface of the ramus; its insertion is on the lateral surface of the ramus. Option D is incorrect because the masseter muscle does not insert on the anterior surface of the mandible, but rather on the lateral surface of the ramus.

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