1.
- Muscle: Platysma
- Origin: Fascia over deltoid and pectoralis major muscles
- Insertion: Mandible
- Action: Depression of mandible with stretching of lower lips
2.
- Muscle: Mentalis
- Origin: Mandible
- Insertion: Skin of the lower lips or chin
- Action: Protrusion of lower lips over upper lips, elevates skin of chin
3.
- Muscle: Orbicularis Oris
- Origin: Midline of mandible and maxilla
- Insertion: Skin around lips
- Action: Protrudes and compresses lips
4.
- Muscle: Corrugator Supercilii
- Origin: Medial end of superciliary arch of frontal bone
- Insertion: Skin of Eyebrow
- Action: Draws eyebrow inferiorly and wrinkles the skin of the forehead vertically
5.
- Muscle: Orbicularis Oculi
- Origin: Medial wall of orbit
- Insertion: Circular path around orbit
- Action: Closes eyes
6.
- Muscle: Occipitofrontalis
- Origin: Epicranial aponeurosis
- Insertion: Skin superior to supraorbital margin
- Action: Draws eyebrow inferiorly, pulls scalp, and wrinkles the skin of the forehead