The muscle highlighted is the masseter.
This muscle is one of the muscles of mastication. The muscles of mastication include:
- Medial pterygoid
- Lateral pterygoid
The masseter is rectangular in shape and consists of a superficial part and a deep part.
Origin: zygomatic arch and maxillary process of the zygomatic bone
Insertion: lateral surface of ramus of mandible
Innervation: masseteric nerve – a branch of the mandibular nerve (V3)
Blood supply: masseteric artery
To learn more about the muscles of mastication, check out this tutorial!