Origin: Anterior iliac crest; lateral half inguinal ligament; Thoracolumber fascia
Insertion: Costal cartilages of ribs 8-12; abdominal aponeurosis to linea alba
Action: Flexes vertebral column (draw throax downwards); rotates vertebral column (torso); laterally flexes vertebral column (torso); compresses abdomen
Iliac Crest |
Inguinal Ligament |
Thoracolumbar Fascia |
Costal Cartilages |
External Oblique
Origin: External surfaces of ribs 5-12
Insertion: Anterior iliac crest and abdominal aponeurosis to linea alba
Action: Flexes vertebral column; rotates vertebral column; laterally flexes vertebral column; compresses abdomen
Origin and Insertion points |
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