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image: Psoas Major
Psoas Major

Psoas Major

 Action :

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

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
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