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Orbicularis Oris

Contents

Videos

ANATOMY

Position

  • Superficial

Origin

  • Modiolus sorrounding the mouth
  • Several muscle fibers that derives from other facial muscles

Insertion

  • Skin and mucuous membrane of lips

Main function

  • Lips
    • Closes mouth
    • Protraction

Nerve innervation

  • Segmental
    • Facial nerve, CN VII
  • Peripheral
    • Buccal and mandibular branches

Arterial supply

  • Facial artery