There are four muscles of mastication. 1) Temporalis 2) Masseter 3) Lateral pterygoid 4) Medial pterygoid. The temporalis is a big fan shaped muscle that sits in the temporal fossa and inserts onto the coronoid process of the mandible. It elevates and retracts the mandible. The masseter sits over of the ramus, and angle...

  The muscles of facial expression are innervated by the seventh cranial nerve – the facial nerve. The muscles of the face can be broken into three groups: 1) Orbital Group 2) Nasal Group 3) Oral Group In addition to muscles in these groups, you have the occipitofrontalis muscle and the auricular muscles...