Human Anatomy: Muscle Groups

Human Anatomy

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Muscle Function & Other Pertinent Medical Information
ORIGIN: Near midline on anterior surface of maxilla and mandible and modiolus at angle of mouth
INSERTION: Mucous membrane of margin of lips and raphe with buccinator at modiolus
ACTION: Narrows orifice of mouth, purses lips and puckers lip edges
NERVE: Accessory parts are incisivus labii superioris and inferioris

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