1. Muscle Name: Platysma
Origin: Fascia over deltoid and pectoralis major muscles
Insertion: Mandible, blends with muscles around the angle of mouth, and skin of the lower face
Action: Draws the outer part of the lower lip inferiorly and posteriorly like pouting, and depresses the muscles
2. Muscle Name: Mentalis
Origin: Mandible
Insertion: Skin of the chin
Action: Elevates and protrudes the lower lip and pulls the chin up acting to pout
3. Muscle Name: 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 acting to kiss, compresses the lips against the teeth, and shapes the lips while talking
4. Muscle Name: Corrugator supercilii
Origin: Medial end of supercilii arch of frontal bone
Insertion: Skin of the eyebrow
Action: Draws eyebrow inferiorly and wrinkles the forehead skin vertically like what we call frowning
5. Muscle Name: Orbicularis Oculi
Origin: Medial wall of orbit
Insertion: Circular path around orbit
Action: Closes an eye
6. Muscle Name: Occipitofrontalis Frontal Belly
Origin: Epicranial aponeurosis
Insertion: Skin superior to supraorbital margin
Action: Draws the scalp anteriorly, raises eyebrows, and wrinkles the forehead skin horizontally looking surprised