1. Platysma
Origin - Fascia over deltoid and pectoralis major muscle
Insertion - Mandible, blends with muscles around angle of mouth, and skin of lower face
Action - Draws outer part of lower lip inferiorly and posteriorly as in pouting; depress mandible
2. Mentalis
Origin - Mandible
Insertion - Skin of chin
Action - Elevates and protrudes lower lip and pulls skin of chin up, as in pouting
3. Orbicularis Oris
Origin - Muscle fibers surrounding the opening of mouth
Insertion - Skin at corner of mouth
Action - Closes and protrudes lips, as in kissing; compress lips against teeth; and shapes lips during speech
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 orbit
Action - Closes eye
6. Occipitofrontalis
Origin - Epicranial aponeurosis
Insertion - Skin superior to supraorbital margin
Action - Draws scalp anteriorly, raises eyebrows, and wrinkles skin of forehead horizontally as in look of surprise
Reference:
Tortora, G. J., & Derrickson, B. H. (2014). Principles of anatomy and physiology (14th ed.). Wiley.