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| - INTERNAL ABDOMINAL OBLIQUE
- | | ORIGIN: |
Lumbar fascia, anterior two thirds of iliac crest and lateral two thirds of inguinal ligament | | INSERTION: | Costal margin, aponeurosis of rectus sheath (anterior and posterior ), conjoint tendon to pubic crest and pectineal line
| | ACTION: |
Supports abdominal wall, assists forced respiration, assists raising intra-abdominal pressure and, with muscles of other side , abducts and rotates trunk. Conjoint tendon supports posterior wall of inguinal canal
| | NERVE: |
Anterior primary rami (T7-12) (conjoint tendon ilioinguinal nerve (L1))
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