1. PLATYSMA
- Origin: Fascia over deltoid and pectoralis major
- Insertion: Mandible, muscles of the mouth, skin of lower face
- Action: Depresses the mandible, draws outer lower lip part posteriorly and inferiorly
2. MENTALIS
- Origin: Mandible
- Insertion: Skin of the chin
- Action: Elevates and protrudes lower lip and pulls the ski of the chin up
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 teeth, shapes lips during speech
4. CORRUGATOR SUPERCILII
- Origin: Medial end of superciliary arch of the frontal bone
- Insertion: Skin of eyebrows
- Action: Wrinkles skin of forehead vertically, draws eyebrows inferiorly
5. ORBICULARIS OCULI
- Origin: Medial wall of orbit
- Insertion: Skin around eyes
- Action: Closes the eyes
6. OCCUPITOFRONTALIS
- Origin: Epicranial aponeurosis
- Insertion: Skin superior to supraorbital margin
- Action: Raises the eyebrows, draws scalp anteriorly, wrinkles skin of forehead horizontally