1. Platysma
- Origin: fascia over deltoid and pectoralis major muscles
- 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; depresses 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 opening of mouth
- Insertion: skin at corner of mouth
- Action: closes and protrudes lips, as in kissing; compresses 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