1. Platysma
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Origin: Fascia covering the pectoralis major and deltoid muscles
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Insertion: Lower border of the mandible
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Action: Depressing the lower lip and corner of the mounth
2. Mentalis
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Origin: Incisive fossa on mandible
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Insertion: Skin of the chin
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Action: Protrudes lower lip
3. Orbicularis oris
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Origin: Maxilla and mandible
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Insertion: Skin at the corner of mouth
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Action: Puckering the lips
4. Corrugator supercilii
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Origin: Superciliary arch of frontal bone
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Insertion: Skin of eyebrow above the supraorbital margin
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Action: Wrinkles forehead
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: Close eyes
6. Occipitofrontalis (Frontal Belly)
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Origin: Epicranial aponeurosis
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Insertion: Skin superior to supraorbital margin
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Action: Wrinkles the skin of the forehead horizontally and raises eyebrows