THe action of the digastric muscle is to depress the mandible or evaluate the larynx

Stylohyoid Muscle

The digastric muscle, which is a small muscle located under the jaw.

lateral pterygoid, digastric, mylohyoid andgeniohyoid muscles

Is located under the jaw,it lies below the body of mandible, and extend in a curve form, from the Mastoid Process to the Symphysis Menti.Belongs to the Suprahyiod muscle group and helps activate the jaw for mastication and swallowing.