Muscles of Facial Expression

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Muscles of Facial Expression
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Levator Labii Superioris

• Origin Frontal process of maxilla
• Insertion Upper lip muscles and nasal cartilage.
• Action Elevates upper lip, flares the nostrils.

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Zygomaticus Minor

• Origin Zygomatic bone, posterior to maxillary
  zygomatic suture.
• Insertion Skin of the upper lip
• Action Elevates the upper lip

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Zygomaticus Major

• Origin Anterior to zygomatic temporal suture
• Insertion Modiolus (angle of the mouth)
• Action Lifts and draws back the angles of the
  mouth (as in smiling)

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Risorius

• Origin Parotid fascia
• Insertion modiolus
• Action Draws the mouth laterally (as in smiling)

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Levator anguli oris

• Origin maxilla, inferior to infraorbital foramen
• Insertion modiolus
• Action Lifts the angles of the mouth as in
  smiling.

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Buccinator

• Origin posterior alveolar process of maxilla,
  posterior alveolar process of mandible, along the
  pterygomandibular raphe
• Insertion modiolus
• Action Compresses cheeks

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