Temporalis
closes jaw, elevates and retracts the mandible
The masseter IS the functional muscle which closes the mandible (jaw).
It elevates and retracts mandible; involved in excursion.
THE ORIGIN OF THE TEMPORALIS MUSCLE IS TEMPORAL FOSSA Insertion: Coronid process of the mandible Function/Action: Closes Jaw
The masseter is the main muscle that shuts or closes the jaw.
The masseter muscle is lateral to the ramus of the mandible.
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
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
The insertion of the temporalis muscle is on the coronoid process of the mandible.