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Risorius

Contents

Anatomy pictures

Muscle attachment zones

Videos - treatment techniques

ANATOMY

Position

  • Superficial

Origin

  • Fascia over the masseter

Insertion

  • Modiolus lateral to the angle of the mouth

Main function

  • Draws angle of mouth laterally

Nerve innervation

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

Arterial supply

  • Facial artery