1. Platysma
- Origin: Fascia over deltoid and pectoralis major muscles
- Insertion: Mandible, blends with the muscles around the angle of the mouth and the skin of the lower face
- Action: Depresses mandible
2. Depressor Labii Inferioris
- Origin: Mandible
- Insertion: Skin of the lower lip
- Action: Depresses the lower lip
3. Orbicular Oris
- Origin: Muscle fibers surrounding the lips
- Insertion: Skin at the corner of the mouth
- Action: Protrudes the lips
4. Corrugator Supercilii
- Origin: Medial end of the superciliary arch of the frontal bone
- Insertion: Skin underneath eyebrow
- Action: Lowers eyebrows; wrinkles the skin of the forehead vertically (like scowling or frowning)
5. Orbicuralis Oculi
- Origin: Medial wall of orbit
- Insertion: Circumference (circular path) of the orbit
- Action: Closes eyelid
6. Occipitofrontalis
- Origin: Epicraneal aponeurosis
- Insertion: Skin superior to supraorbital margin
- Action: Raises eyebrows; wrinkles the skin of the forehead horizontally (like the look of being surprised)