Iliopsoas muscle

Last revised by Mr. Dennis Odhiambo Agolah on 19 Jul 2022

The iliopsoas muscle is found within the iliopsoas compartment and is an important muscle in locomotion and upright posture. 

The iliopsoas muscle has its origin at the fusion of the psoas major and iliacus muscles. This fusion occurs at the level of L5-S2, and the combined muscles pass from the pelvis to the thigh under the inguinal ligament.

The iliopsoas muscle inserts into the lesser trochanter of the femur via the psoas tendon. 

  • femoral nerve (iliacus part)
  • direct branches of the lumbar plexus (psoas part)

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Cases and figures

  • Figure 1: Gray's illustration
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