1. Platysma
Origin: Fascia over deltoid and pectoralis major muscles
Insertion: Base of mandible; skin of cheek and lower lower; blends with angle of mouth; orbicularis oris
Action: Draws outer part of lower lip inferiority and posteriorly as in pouting; depresses mandible
2. Mentalis
Origin: Incisive fossa of mandible
Intervention: Inserts into the skin of chin
Action: Provides stability towards the lower lip/chin to allow it to pout; Protrudes lower lip and pulls skin of chin up.
3.Orbicularis Oris
Origin: Medial aspects of maxilla and mandible, perioral skin and muscles, modiolus
Intervention: Skin at corner of mouth
Action: Closes mouth, compresses and protrudes lips; Compresses lips against teeth; and shapes lips during speech
4. Corrugator Supercilii
Origin: Medial end of superciliary arches, fibers of orbicularis oculi muscle
Intervention: Skin of eyebrow
Action: Creates vertical wrinkles over glabella
5. Orbicularis Oculi
Origin: Nasal part of frontal bone, frontal process of maxilla, medial palpebral ligament, lacrimal bone
Intervention: Circular path around orbit
Action: Orbital part - closes eyelids tightly; Palpebral part: closes eyelids gently; and Deep palpebral part - compresses lacrimal sac
6. Occipitofrontalis
Origin: Frontal belly - skin of eyebrow, muscles of forehead; Occipital belly - lateral ⅔ of superior nuchal line
Intervention: Skin superior to supraorbital margin.
Action: Frontal belly: elevates eyebrows, wrinkles skin of forehead; Occipital belly: retracts scalp