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External abdominal obliques
Origin: Lower 8 ribs
Insertion: Linea alba
Action: Rotates vertebral column and compresses abdominal contents
Innervation- Intercostal nerves
Internal abdominal obliques
Origin: Iliac Crest
Action: Rotates vertebral column, compresses abdominal contents
Innervation: Intercostal nerves
Rectus Abdominus
Origin: Pubis
Insertion: Xiphoid process and ribs
Action: Flexes vertebral column, compresses abdominal contents
Innervation: Intercoastal nerves
Transverse Abdominis
Origin: Last 6 ribs, iliac crest
Action: Compresses abdominal contents
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