Updated: 10/19/2017

Psoas

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Origin Anterior surfaces and lower borders of transverse processes of L1 - L5 and bodies and discs of T12 - L5
Insertion Lesser trochanter
Action Flex the torso and thigh with respect to each other
Innervation Direct fibers of L1 - L3 of lumbar plexus (L1, L2, L3)
Arterial Supply Lumbar branch of iliopsoas branch of internal iliac artery
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