1. Platysma
Origin: Fascia of the clavicles, pectoralis major, and deltoid muscles.
Insertion: Mandible
Action: lowers the mandible, pulling the corner of the lips to both sides and up and down
2. Mentalis
Origin: Mandible
Insertion: Skin of the lower lip
Action: Elevates the chin forward and protrudes the lips
3. Orbicularis Oris
Origin: Midline of Mandible and Maxilla
Insertion: Skin of the upper and lower lip
Action: Compresses and protrudes the lips
4. Corrugator Supercilii
Origin: Medial of superciliary arch
Insertion: Skin of eyebrows
Action: Draws the eyebrows medially and inferiorly, wrinkling the skin in the process
5. Orbicularis Oculi
Origin: Nasal part of frontal bone, frontal process of maxilla, medial palpebral ligament, and posterior lacrimal crest of lacrimal bone
Insertion: lateral palpebral raphe and tarsal plates
Action: Closes the eyelid
6. Occipitofrontalis
Origin: superior nuchal lines of occipital bone
Insertion: epicranial aponeurosis
Action: draws the scalp backwards