Dissection of iliopsoas muscle and lumbar plexus

Iliopsoas and quadratus lumborum muscles, anterior view

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Image #184-6
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Dissection of iliopsoas muscle and lumbar plexus
Iliopsoas and quadratus lumborum muscles, anterior view
The relations of the iliopsoas muscles to the lumbar vertebrae, pelvic girdle and thigh are illustrated in this dissection. In the following two views details of the lumbar plexus and of the innervation of the iliopsoas muscle have been worked out on the left side of the same specimen.
1 . Abdominal aorta
2 . 7th costal cartilage
3 . Ren dexter
4 . Transversalis fascia
5 . Ureter
6 . Sigmoid colon
7 . Femoral nerve
8 . External iliac artery
9 . Upper pointer: Uterus Lower pointer: Urinary bladder
10 . Pubic crest
11 . 12th rib
12 . Subcostal nerve
13 . 3rd vertebral ligament (covered by anterior longitudinal ligament)
14 . Iliohypogastric nerve
15 . Quadratus lumborum muscle
16 . Psoas major muscle (psoas minor muscle absent in this specimen)
17 . Common iliac artery
18 . Iliacus muscle
19 . Iliac crest
20 . Lateral femoral cutaneous nerve
21 . Deep circumflex iliac artery
22 . Greater trochanter