The muscles surrounding the eyes, nose, and mouth which act as contractors and dilators of these openings. They are a large group of superficial muscles which have their insertion into the skin rather than bones. They aid speech and chewing and also modify the expression of the face by their action on the forehead, eyelids, cheeks, nostrils, and lips. They are derived from the second pharyngeal arch and are innervated by the facial nerve.
Muscles of facial expression