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Psoas Major


Origin :

  • From anterior surfaces and lower borders of transverse processes of L1 – L5 and bodies and discs of T12 – L5.

Insertion :

  • Lesser trochanter.

Innervation :

  • From direct fibers of L1 – L3 of lumbar plexus.

Arterial Supply :

  • Lumbar branch of iliopsoas branch of internal iliac artery.

Depth :

  • Superficial


Action :

  • Flex the torso and thigh with respect to each other.
Target Muscles Target Muscles