Iliopsoas
Iliopsoas is sometimes classified as two muscles, Iliacus and Psoas major, with Iliacus arising from the Ilium and Psoas from the vertebrae.
Origin
- Inner surface of the Ilium.
- Base of the sacrum.
- Sides of the bodies of T12-L5..
Insertion
- Lesser trochanter of the femur.
Actions
- Flexion of the hip Lateral rotation of the hip.
- Flexes torso when the legs are fixed (e.g. laying to sitting).
Innervation
- Femoral nerve and branches of the lumbar plexus.
Daily uses
- Climbing a step.
Example stretches
- Hip flexor stretch.
Example strengthening exercises
- Seated hip flexion with a resistance band.
- Standing hip flexion with a resistance band.
Related injuries
- Iliopsoas inflammation.
- Iliopsoas rupture.
Related muscles
- Rectus femoris.
