Today's Hours: 8:00am - 10:00pm

Bassett Collection of Stereoscopic Images of Human Anatomy

Dissection of iliopsoas muscle and lumbar plexus

Lumbar plexus; nerves to psoas major

Image #184-7

KEYWORDS: Muscles and tendons, Peripheral nervous system.

Creative Commons

Stanford holds the copyright to the David L. Bassett anatomical images and has assigned Creative Commons license Attribution-Share Alike 4.0 International to all of the images.

Creative Commons License logo

For additional information regarding use and permissions, please contact Dr. Drew Bourn at dbourn@stanford.edu.

Dissection of iliopsoas muscle and lumbar plexus
Lumbar plexus; nerves to psoas major
The left psoas major has been detached from its spinal origins and turned laterally. Nerves to the psoas, as well as the major parts of the lumbar plexus, have been exposed.
  1. Right crus of diaphragm
  2. Right kidney
  3. Abdominal aorta (cut off)
  4. Sympathetic trunk (pointer on sympathetic trunk ganglia)
  5. Intervertebral disc L. II-III
  6. Lumbar artery and vein (cut off)
  7. Psoas major muscle
  8. Quadratus lumborum muscle covered by transversalis fascia
  9. Iliohypogastric nerve (faintly visible)
  10. Ilioinguinal nerve
  11. Lateral femoral cutaneous nerve
  12. Genitofemoral nerve
  13. Ureter
  14. Middle sacral artery
  15. Common iliac artery and vein
  16. Lumbosacral trunk
  17. Obturator nerve
  18. Medial arcuate ligament
  19. Diaphragm (Lateral arcuate ligament lies in area between pointers)
  20. Rib XII
  21. Subcostal nerve
  22. Muscular branch of nerve L. II
  23. Genitofemoral nerve
  24. Lumbar nerve II
  25. Lateral femoral cutaneous nerve
  26. Lumbar nerve III
  27. Psoas major muscle
  28. Quadratus lumborum muscle
  29. Lumbar nerve IV
  30. Iliac crest
  31. Iliacus muscle