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Name of Muscle: Platysma
Origin: Fascia over deltoid and pectoralis major muscles
Insertion: Mandible, blends with muscles around angle of mouth, and skin of lower face
Function: Draws out part of lower lip inferiorly and posteriorly (pouting), depresses the mandible
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Name of Muscle: Depressor Labii Inferioris
Origin: Mandible
Insertion: Skin of lower lip
Function: Depresses lower lip
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Name of Muscle: Orbicularis Oris
Origin: Muscle fibers surrounding opening of mouth
Insertion: Skin at corner of mouth
Function: Closes and protrudes lips (kissing)
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Name of Muscle: Corrugator Supercili
Origin: Medial end of superciliary arch of frontal bones
Insertion: Skin of eyebrow
Function: Draws eyebrow inferiorly and wrinkles skin of forehead vertically (frowning)
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Name of Muscle: Orbicularis Oculi
Origin: Medial wall of orbit
Insertion: Circular path around orbit
Function: Closes the eye
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Name of Muscle: Occipitofrontalis (Frontal belly)
Origin: Epicranial aponeurosis
Insertion: Skin superior to supraorbital margin
Function: Draws scalp anteriorly, raises eyebrows, and wrinkles skin of forehead horizontally