Face - LO 4

4. Describe the various groups of facial muscles. How are these groups distributed about the face? What are functions and innervations of the facial muscles?

Muscles of the superficial head fall into two major groups: epicranial and craniofacial. Epicranial muscles are few, primarily act upon the scalp, and are best represented by the occipitofrontalis m.: a muscle with two bellies (frontal and occipital) connected by an intermediate epicranial aponeurosis. Craniofacial muscles are located in the facial region and are often referred to as muscles of facial expression, as they move the skin of the face.