1. Platysma
- Origin: Fascia over deltoid and pectoralis major muscles
- Insertion: Mandible, blends with muscles around the angle of mouth, and skin of lower face
- Action: Draws the outer part of the lower lip inferiorly and posteriorly as in pouting and depresses the mandible
2. Mentalis
- Origin: Mandible
- Insertion: Skin of chin
- Action: Elevates and protrudes the lower lip as in pouting and depresses the mandible
3. Orbicularis oris
- Origin: Muscle fibers
- Insertion: Skin at corner of mouth
- Action: Closes, compresses, and protrudes lips
4. Corrugator supercilii
- Origin: Medial end of superciliary arch of frontal bone
- Insertion: Skin of eyebrow
- Action: Draws eyebrow inferiorly and medially and wrinkles skin of forehead vertically as in frowning
5. Orbicularis oculi
- Origin: Medial wall of orbit
- Insertion: Circular path around orbit
- Action: Closes the eye
6. Occipitofrontalis
- Origin: Epicranial aponeurosis
- Insertion: Skin superior to supraorbital margin
- Action: Moves up the scalp and eyebrows, and wrinkles skin of the forehead horizontally as in a look of surprise