1. Platysma
Origin: Fascia over deltoid and pectoralis major
Insertion: Mandible
Action: Draws the outer part of lower lip inferiorly and posteriorly
2. Mentalis
Origin: Mandible
Insertion: Skin of chin
Action: Elevates and protrudes the lower lip and pulls skin of chin up
3. Orbicularis Oris
Origin: Muscle fibers surrounding opening of the mouth
Insertion: Skin at corner of mouth
Action: Closes and protrudes the lips
4. Corrugator supercilii
Origin: Medial end of superciliary arch of frontal lobe
Insertion: Skin of Eyebrow
Action: Draws eyebrows inferiorly and wrinkles skin of forehead
5. Orbicularis oculi
Origin: Medial wall of orbit
Insertion: Circular path around orbit
Action: closes eye
6. Occipitofrontalis
Origin: Epicranial aponeurosis
Insertion: Skin superior to supraorbital margin
Action: Draws the scalp anteriorly, raises eyebrow, wrinkles skin of forehead horizontally