Muscles of the Posterior Abdominal Wall PDF

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Muscles of the Posterior Abdominal Wall Psoas Major Origin: T12 and all lumbar vertebral bodies Insertion: Lesser trochanter of the femur Movement: Flexes thigh at hip joint and flexes trunk when body is supine Innervation: Anterior rami of L1-L3 Psoas Minor Origin: Body of T12 and L1 Insertion: pectinal line of pelvic brim Movement: weak flexor of trunk Innervation: Anterior rami of L1 Quadratus Lumborum Origin: Posterior iliac crest Insertion: 12th rib Movement: Stabilized 12th rib and aids in pulling rib down during forced expiration Innveration: anterior rami of T12 and all lumbar Iliacus Origin: Iliac fossa Insertion: Lesser trochanter of femur Movement: Flexor of the thigh Innveration: L2-L4...