Temporalis
closes jaw, elevates and retracts the mandible
The masseter IS the functional muscle which closes the mandible (jaw).
THE ORIGIN OF THE TEMPORALIS MUSCLE IS TEMPORAL FOSSA Insertion: Coronid process of the mandible Function/Action: Closes Jaw
The masseter muscle originates on the zygomatic arch and inserts on the angle of the mandible. It is responsible for elevating the mandible during jaw closure and is one of the key muscles involved in chewing.
The temporalis muscle acts to elevate and retract the mandible (lower jaw) during the process of chewing. It is one of the main muscles involved in mastication (chewing) and helps in closing the mouth during jaw movements.
The masseter muscle is the chewing muscle covering the angle of the mandible. During bilateral contraction, the muscle elevates the mandible, raising the lower jaw.
A person has two jaw bones. One upper jaw bone called the maxilla and the lower bone called the mandible. The maxilla doesn't move but the mandible does. The muscle (masseter) that closes the two is one of the strongest muscles in the human body.
styloglossus: retracts the tongue, elevates side
The muscle responsible for elevating and retracting the lower jaw is the temporalis muscle. This fan-shaped muscle is located on the side of the head and plays a key role in the process of mastication (chewing). When it contracts, it not only raises the mandible but also pulls it backward, contributing to the retraction movement.
The masseter muscle is lateral to the ramus of the mandible.
Gravity plays a large part in opening the jaw, but there are muscles that help forcefully open your jaw. The most important of these is the digastric muscle, which connects from the mastoid process of the temporal bone to the hyoid bone, and then from the hyoid bone to the digastric fossa of the mandible.
the masseter muscle