1. Platysma
- Origin: Fascia that covers the deltoid muscle and pectoralis major muscle
- Insertion: Mandible, muscle around angle of mouth, and skin of lower face
- Action: Draws outer part of lower lip inferiorly and posteriorly and depresses mandible
2. Mentalis
- Origin: Mandible
- Insertion: Skin of chin
- Action: Elevates and protrudes the lower lip and pulls up skin of chin
3. Orbicularis oris
- Origin: Muscle fibers surrounding the opening of the mouth
- Insertion: Skin at the corner of the mouth
- Action: Closes and protrudes the lips; compresses lips against teetch; shapes lips during speech
4. Corrugator supercilii
- Origin: Medial end of superciliary arch of the frontal lobe
- Insertion: Skin of the eyebrow
- Action: Draws eyebrow inferiorly and medially, wrinkles skin of forehead vertically
5. Orbicularis oculi
- Origin: Medial wall of orbit
- Insertion: Circular path around orbit
- Action: Closes and squints eye, depresses upper eyelid, and elevates lower eyelid
6. Occipitofrontalis
- Origin: Epicranial aponeurosis
- Insertion: Skin superior to supraorbital margin
- Action: Elevates eyebrows and wrinkles skin of forehead horizontally