External
The masseter acts as the antagonist.
The antagonist for the mandible is the temporalis muscle. It is responsible for closing the jaw while the mandible is involved in opening 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.
.. Masseter - prime mover of jaw closure - elevates the mandible ... External intercostals - with 1st rib fixed by scalene muscles - pull ribs toward one
antagonist muscle
A antagonist muscle is a muscle that opposes the action of another muscle. The Triceps Brachii is the antagonist of the Biceps Brachii.
antagonist
the masseter muscle
The insertion of the temporalis muscle is on the coronoid process of the mandible.
lateral pteregoid
Temporalis