- Flex the torso and thigh with respect to each other.
- From anterior surfaces and lower borders of transverse processes of L1 − L5 and bodies and discs of T12 − L5.
- Lesser trochanter.
- From direct fibers of L1 − L3 of lumbar plexus.
Arterial Supply :
- Lumbar branch of iliopsoas branch of internal iliac artery.