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ABDOMINAL WALL Anterior & posterior abdominal wall . Structure of anterior abdominal wall • Skin • Superficial fascia • Deep fascia • Muscles • Extraperitonial fascia • Parietal peritoneum Muscle Origin Insertion external abdominal oblique lower 8 ribs linea alba, pubic crest & tubercle, anterior superior iliac spine & anterior half of iliac crest internal abdominal oblique lumbar fascia, anterior 2/3 of the iliac crest, lateral 2/3 of the inguinal ligament lower 3 or 4 ribs, linea alba, pubic crest and pecten transversus abdominis lower 6 ribs, thoracolumbar fascia, anterior 3/4 of the iliac crest, lateral 1/3 of inguinal ligament linea alba, pubic crest and pecten rectus abdominis pubic crest and symphysis xiphoid process of the sternum and costal cartilages 5-7 EXTERNAL OBLIQUE MUSCLE Inguinal ligament & superficial inguinal ring INTERNAL OBLIQUE MUSCLE Cremaster muscle Transversus abdominis muscle RECTUS ABDOMINIS Inguinal canal Spermatic cord Structure of posterior abdominal wall • 5 lumbar vertebrae • 12 rib • Upper part of bony pelvis • Psoas muscle • Quadratus lumborum muscle • Origin of transversus abdominis muscle • iliacus Muscle Origin Insertion psoas bodies and transverse processes of lumbar vertebrae + T12 lesser trochanter of the femur quadratus lumborum posterior part of the iliac crest and the iliolumbar ligament transverse processes of lumbar vertebrae 1-4 and the 12th rib iliacus iliac fossa and iliac crest lesser trochanter of the femur Psoas & iliacus quadratus lumborum Thank you
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