Facial Muscles 3d Animation. The facial muscles (Musculi faciales) also called craniofacial muscles, are a group of about 20 flat skeletal muscles lying underneath the skin of the face and scalp. Most of them originate from the bones or fibrous structures of the skull and radiate to insert on the skin. Contrary to the other skeletal muscles they are not surrounded by a fascia, with the exception of the buccinator muscle. The facial muscles are positioned around facial openings (mouth, eye, nose