The facial muscles (or muscles of facial expression) are situated within the subcutaneous tissue and are responsible for the movements of skin folds, providing different facial expressions. The facial muscles originate from the bones of the facial skeleton (viscerocranium) and insert into the skin.
The facial muscles are mostly grouped around the natural orifices of the face (eyes, nose, mouth), taking part in the closing or widening of these orifices.
The muscles in the calvaria region include the occipital and frontal bellies of the occipitofrontalis.
The facial muscles around the orbital opening include:
The muscles around the oral opening are the following:
The muscles around the nose opening include:
All muscles of facial expression are innervated by branches of the facial nerve (CN VII).