1. Platysma
Origin: Fascia over deltoid and pectoralis major muscles
Insertion: Mandible, muscles around angle of mouth and skin of lower face.
Action: Draws outer part of lower lip posteriorly, depresses mandible.
2. Mentalis
Origin: The Mandible
Insertion: Skin of chin.
Action: Elevates and protrudes lower lip while pulling skin of chin up.
3. Orbicularis oris
Origin: Muscle fibers from opening of the mouth.
Insertion: Skin at corner of mouth.
Action: Protrudes lips.
4. Corrugator Supercilii
Origin: medial end of superciliary arch of frontal bone.
Insertion: Skin of eyebrow.
Action: Draws eyebrow inferiorly and wrinkles skin of forehead vertically as in frowning.
5. Orbicularis Oculi
Origin: Medial wall of orbit
Insertion: Circular path around the orbit.
Action: Closes right eye.
6. Occipitofrontalis (frontal belly)
Origin: Epicranial aponeurosis.
Insertion: Skin superior to supraorbital margin.
Action: Scalp raises anteriorly, raises eyebrows, and wrinkles the skin of forehead.