1. Muscle - Platysma
Origin - Upper thoracic and shoulder regions from a fascia that covers the pectoralis major and deltoid muscles
Insertion - Anterolateral aspect of the neck, to insert on the mandible, the skin and subcutaneous tissue of the lower face
Action - Depresses mandible and angle of mouth, tenses skin of lower face and anterior neck
2. Muscle - Mentalis
Origin - Incisive fossa of mandible
Insertion - Skin of chin (Mentolabial sulcus)
Action - Elevates, everts and protrudes lower lip, wrinkles skin of chin
3. Muscle - 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 pushes lips forward
4. Muscle - Corrugator supercilii
Origin - Medial end of superciliary arches, Fibers of orbicularis oculi muscle
Insertion - Skin above middle of supraorbital margin
Action - Pulls skin of eyebrow downward and medially, produces vertical wrinkles in forehead
5. Muscle - 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 tightly and gently, Compresses lacrimal sac, Lifts cheek
6. Muscle - 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 - Lifts eyebrow and eyelid, produces horizontal wrinkles in forehead
References:
Rad, A. (2022, February 16). Orbicularis oculi. Kenhub. Retrieved September 22, 2022, from https://www.kenhub.com/en/library/anatomy/orbicularis-oculi
Sendić, G., MD. (2022, February 16). Corrugator supercilii muscle. Kenhub. Retrieved September 22, 2022, from https://www.kenhub.com/en/library/anatomy/corrugator-supercilii-muscle
Sendić, G., MD. (2022, July 6). Orbicularis oris muscle. Kenhub. Retrieved September 22, 2022, from https://www.kenhub.com/en/library/anatomy/orbicularis-oris-muscle
Sendić, G., MD. (2022, July 6). Platysma. Kenhub. Retrieved September 22, 2022, from https://www.kenhub.com/en/library/anatomy/the-platysma
Vasković, J., MD. (2022, August 2). Mentalis muscle. Kenhub. Retrieved September 22, 2022, from https://www.kenhub.com/en/library/anatomy/mentalis-muscle
Vasković, J., MD. (2022, July 6). Occipitofrontalis muscle. Kenhub. Retrieved September 22, 2022, from https://www.kenhub.com/en/library/anatomy/occipitofrontalis-muscle