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Transcript

Internal oblique

  • A: Supports abdominal wall
  • O: Iliac crest
  • I: Xiphoid

External oblique

  • A: Supports abdominal wall
  • O: 5-12 ribs
  • I: Xiphoid

Transverse abdominis

  • A: Aids in twisting and supporting abdominal wall
  • O: Iliac crest
  • I: Xiphoid

Rectus abdominis

  • A: Flexes waist as in sit-ups
  • O: Pubis
  • I: Xiphoid process, costal cartilages 5-7

Buccinator

  • A: Compresses cheek; draws corner of mouth laterally; also a muscle of mastication
  • O: Molar region of maxilla and mandible
  • I: Orbicularis oris

Masseter

  • A: Prime mover of jaw closure; elevates mandible
  • O: Zygomatic bone
  • I: Mandible

Nasalis

  • A: Compress/ expand nares
  • O: Maxilla
  • I: Nasal cartilage

AOI Facial and abdominal muscles

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