1. Platysma
Origin: Skin/fascia of infra- and supraclavicular regions
Insertion: Lower border of mandible, skin of buccal/cheek region, lower lip, modiolus, orbicularis oris muscle
Action: Depresses mandible and angle of mouth, tenses skin of lower face and anterior neck
2. Mentalis
Origin: Incisive fossa of mandible
Insertion: Skin of chin (Mentolabial sulcus)
Action: Elevates, everts and protrudes lower lip, wrinkles skin of chin
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 supercili
Origin: Medial end of superciliary arches, Fibers of orbicularis oculi muscle
Insertion: Skin above middle of supraorbital margin
Action: Wrinkles forehead
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: Orbital part: Closes eyelids tightly; Palpebral part: Closes eyelids gently; Deep palpebral part: Compresses lacrimal sac
6. Occipitofrontalis
Origin: Frontal belly (frontalis): Skin of eyebrow, muscles of forehead; Occipital belly (occipitalis): (Lateral 2/3 of) superior nuchal line
Insertion: Epicranial aponeurosis
Action: Frontal belly: Elevates eyebrows, wrinkles skin of forehead; Occipital belly: Retracts scalp