Psoas Minor

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Psoas minor.png
Psoas minor muscle highlighted
Psoas Minor
Muscle Type
Origin Lateral surface bodies of T12 and L1 vertebrae and intervening intervertebral disc
Insertion Passes behind the inguinal ligament to insert into the iliopubic eminence
Action Weak lumbar spine flexion
Antagonists Erector Spinae
Spinal innervation L1
Peripheral Innervation Anterior ramus of L1 nerve root

The psoas minor is functionally insignificant compared to its companion Psoas Major muscle, and is not universally present in all humans.