External Abdominal Oblique Muscle

External Abdominal Oblique Muscle The muscle indicated is the external oblique muscle of the abdomen. The external oblique muscle is the most superficial lateral muscle of the anterior abdominal wall. The three muscles which make up the lateral part of the anterior wall of the abdomen from superficial to deep are the: External oblique Internal oblique Transversus abdominis Origin: ribs 5-12 Insertion: Iliac crest, pubic tubercle, linea alba Innervation: thoracoabdominal nerve and subcostal nerve Action: Flexion and rotation of the vertebral column – brings about contralateral rotation of the torso. Unilateral contraction causes lateral flexion of the vertebral column. Important …

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