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

Example strengthening exercises

Related injuries

Related muscles