Psoas

 

Origin Vertebral bodies of T12-L4, intervertebral discs between T12-L4, transverse processes of L1-L5 vertebrae
Insertion Lesser trochanter of femur as iliopsoas tendon
Action Hip joint: Flexion of the thigh/trunk, lateral rotation of the thigh
Lateral flexion of the trunk

 

Innervation

 

    Anterior rami of spinal nerves L1-L3
Blood supply Lumbar branch of iliolumbar artery

 


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