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Muscle Name: Internal Oblique

Medical Name:

• Internal Oblique

Other Names:

• Side Abs
• Oblique Abdominal Muscle

Head:

• None (Single muscle with multiple segments)

Movement:

• Ipsilateral rotation of the torso
  • Rotating the torso to the same side
• Lateral flexion of the torso
  • Bending the torso to the side
• Flexion of the spine
  • Bending the torso forward
• Compression of the abdominal contents
  • Assisting in forced exhalation, childbirth, and defecation

Attachment:

• Origin:
  • Thoracolumbar fascia
  • Anterior two-thirds of the iliac crest
  • Inguinal ligament
• Insertion:
  • Inferior borders of ribs 10-12
  • Linea alba
  • Pubic crest

Related Muscles:

• External Oblique
• Rectus Abdominis
• Transversus Abdominis
• Quadratus Lumborum

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