The Temporalis muscle originates from which bone?

• A. Temporal bone
• B. Mandible
• C. Zygomatic bone
• D. Occipital bone

Answer: (A)

The main idea is identifying where a muscle’s fixed attachment lies. The temporalis begins on the side of the skull at the temporal fossa of the temporal bone (and its nearby superior temporal line) and then extends downward to attach to the coronoid process of the mandible. That makes the temporal bone the correct origin because the muscle starts from the skull and moves to the jaw to close it.

The mandible is where the temporalis inserts to elevate the jaw, not where it originates. The zygomatic bone contributes to the cheek and part of the zygomatic arch, which the temporalis runs beneath, but it isn’t the muscle’s origin. The occipital bone is at the posterior skull and does not provide the temporalis’ origin.