ANATOMY – POSTERIOR ABDOMINAL WALL – QUADRATUS LUMBORUM – QL

QUADRATUS LUMBORUM – QL

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  • Location: posterior abdominal wall
  • Attachments: inferior margin of 12th rib and upper four lumbar transverse processes, iliac crest and iliolumbar ligament
  • Blood supply: branches of the lumbar arteries; other smaller arterial branches, as described below
  • Innervation: ventral rami of the 12th thoracic nerve; L1-L4 spinal nerves
  • Action: extension and lateral flexion of vertebral column; fixes 12th rib during inspiration to stabilize the diaphragm

YOUTUBE VIDEOS

  1. Anatomy Zone – Muscles of the Posterior Abdominal Wall .

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