Final answer:
The temporalis muscle originates from the temporal fossa and the temporal fascia, which are located above the zygomatic arch on the lateral side of the skull.
Step-by-step explanation:
The temporalis muscle originates from the temporal fossa and the temporal fascia. This fossa is a shallow space located on the lateral side of the skull above the level of the zygomatic arch. The temporalis is a major muscle of mastication, playing a crucial role in chewing by pulling the mandible upward when it contracts.
The temporal bone is an important component in establishing the point of origin for the temporalis muscle. It consists of several regions, including the squamous portion, mastoid portion, and the zygomatic process, which forms the posterior part of the zygomatic arch. This muscle is attached not only to the temporal fossa but also to the temporal fascia, a layer of tissue over the muscle.
The temporalis muscle originates from the zygomatic arch. The zygomatic arch is formed by the junction of two bony processes: a short anterior component, the temporal process of the zygomatic bone (cheekbone), and a longer posterior portion, the zygomatic process of the temporal bone. The temporal process and zygomatic process join together to form the zygomatic arch.