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Platysma
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Origin: fascia over deltoid and pectoralis major muscles
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Insertion: mandible; blends with muscles around angle of the mouth and skin of lower face
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Action: draws outer part of lower lip inferiorly and posteriorly as in pouting; depresses mandible
2. Mentalis
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Origin: mandible
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Insertion: skin of the chin
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Action: elevates and protrudes lower lip; pulls skin of the chin up, as in pouting
3. Orbicularis oris
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Origin: muscle fibers surrounding opening of the mouth
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Insertion: skin at the corner of the mouth
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Action: closes and protrudes lips (kissing); compresses lips against teeth, and shapes lips during speech
4. Corrugator supercilii
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Origin: medial end of superciliary arch of frontal bone
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Insertion: skin of eyebrow
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Action: draws eyebrow inferiorly; wrinkles skin of forehead vertically (frowning)
5. Orbicularis oculi
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Origin: medial wall of orbit
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Insertion: circular path around orbit
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Action: closes the eye
6. Frontal belly (Occipitofrontalis)
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Origin: Epicranial aponeurosis
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Insertion: skin superior to supraorbital margin
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Action: raises eyebrows, wrinkles skin of the forehead
Reference:
Tortora, G. J., & Derrickson, B. (2015). Principles of Anatomy & Physiology (15th ed.) [E-book]. John Wiley & Sons, Inc.