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Psoas Major
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| |
| Psoas Major | |
|---|---|
| Muscle Type | |
| Origin | Transverse processes of L1-5, bodies of T12-L5 and intervertebral discs below bodies of T12-L5 |
| Insertion | Middle surface of lesser trochanter of femur |
| Action | Stabiliser and flexor of the hip, lateral flexion of the trunk. |
| Synergists | |
| Antagonists | Gluteus Maximus |
| Spinal innervation | L1, L2, L3 |
| Peripheral Innervation | Anterior primary rami of L1-3 nerves (mainly L2) |
| Vasculature | lumbar arteries, iliolumbar artery, deep circumflex iliac artery, external iliac artery, femoral artery |
Lesion Effect
Loss of pelvic swing on walking.
