The muscles of mastication control the jaw, specifically its adduction.
Your tongue assists with mastication. Mastication mainly is done by the Temporal Mandibular muscles though.
Masseter
Yes
Trismus
muscle of mastication.
temporalis
The masseter muscle is lateral to the ramus of the mandible.
Mastication
You are in direct control of skeletal muscle.
Mastication, or chewing, involves a total of four muscles. These muscles are the masseter, temporalis, medial pterygoid, and lateral pterygoid.
Mouth
mastication is simply chewing, so yes, it is voluntary