Human Anatomy: Muscle Groups

Human Anatomy

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Muscle Function & Other Pertinent Medical Information
ORIGIN:Costal margin, lumbar fascia, anterior two thirds of iliac crest and lateral half of inguinal ligament
INSERTION:Aponeurosis of posterior and anterior rectus sheath and conjoint tendon to pubic crest and pectineal line
ACTION:Supports abdominal wall, assists forced expiration and raising intra-abdominal pressure. Conjoint tendon supports posterior wall of inguinal canal
NERVE:Anterior primary rami (T7-12). Conjoint tendon ilioinguinal nerve (L1)


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