1. Platysma
Origin - Fascia that covers the clavicle, the acromial region, and the superior portions of the pectoralis major and deltoid muscles
Insertion - Mandible and the skin, and subcutaneous tissue of the lower face
Action - Draws the corners of the mouth inferiorly and wide it; draws the skin of the neck superiorly when teeth are clenched
2. Mentalis
Origin - Incisive fossa of the mandible
Insertion - Soft tissue of the chin
Action - Elevates and protrudes the lower lip, and pulls the skin of the chin
3. Orbicularis oris
Origin - Medial aspects of mandible and maxilla
Insertion - Skin of lips and oral mucosa
Action - Closes the mouth and compresses and protrudes the lips
4. Corrugator supercilii
Origin - Medial end of the superciliary arch of frontal bone, cranially to the root of the nose
Insertion - Skin of the eyebrow above the middle part of the supraorbital margin
Action - Draws the two eyebrows together medially and inferiorly
5. Orbicularis oculi
Origin - Nasal portion of the frontal bone, frontal process of maxilla, medial palpebral ligament, and the lacrimal bone
Insertion - Lateral palpebral raphe and superior and inferior tarsal plates
Action - Closes eyelids tightly
6. Occipitofrontalis
Origin - Lateral two-thirds of the highest nuchal line, and on the mastoid process of the temporal bone
Insertion - Epicranial aponeurosis
Action - Raises the eyebrows and wrinkles forehead
Reference:
Tortora, G. J., & Derrickson, B. (2017). Principles of anatomy and physiology. Wiley Custom Learning Solutions.