What are the anatomic features of the posterolateral (lumbar) region in relation to abdominal hernias?

Updated: Jul 01, 2021
  • Author: Assar A Rather, MBBS, MD, FACS; Chief Editor: John Geibel, MD, MSc, DSc, AGAF  more...
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In the posterolateral (lumbar) region, the quadratus originates from the iliac crest and the iliolumbar ligament from between the iliac crest and the fifth lumbar transverse process. It then inserts along the 12th rib. The psoas arises from vertebrae T12-L5 and passes downward under the inguinal ligament to insert on the lesser trochanter.

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