1. Platysma
Origin: Fascia over the clavicle, pectoralis major, and deltoid muscles
Insertion: Inferior border of mandible and skin of lower face
Action: pulling down the mandible, pulling the corners of the lips to the side and down, forms wrinkles in the neck with age.
2. Mentalis
Origin: Incisive fossa of the mandible
Insertion: Skin of the lower lip
Action: Raise the skin of the chin and elevate, evert, and protrude the lower lip
3. Orbicularis oris
Origin: Medial aspects of maxilla and mandible, perioral skin and muscles, modiolus
Insertion: Skin and mucous membrane of lips
Action: Closes mouth, compresses and protrudes lips
4. Corrugator supercilii
Origin: Medial end of superciliary arches, Fibers of orbicularis oculi muscle
Insertion: Skin above middle of supraorbital margin
Action: Creates vertical wrinkles over glabella
5. Orbicularis oculi
Origin: Nasal part of frontal bone, frontal process of maxilla, medial palpebral ligament, lacrimal bone
Insertion: Skin of orbital region, lateral palpebral raphe, superior and inferior tarsal plates
Action: Closes eyelids, compresses lacrimal sac
6. Frontalis or the Frontal Belly of the Occipitofrontalis/Epicranius muscle
Origin: Epicranial aponeurosis
Insertion: Skin of the eyebrows
Action: Elevates eyebrows, wrinkles forehead, and pulls the scalp forward.