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Laboratory 40. Posterior Abdominal Wall
Step 16. Muscles of the Posterior Abdominal Wall

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Four major muscles contribute to the posterior abdominal wall. They are the:

The psoas major muscle arises from the lumbar vertebra and passes into the pelvis where it joins with the iliacus muscle to form the iliopsoas muscle. The latter muscle inserts on the lesser trochanter of the femur (Figure 40.7).

Links and References:
Grant's: 2.104
Netter (1ed.): 326, 250 (2ed.): 322, 250
Rohen/Yokochi: 314