Muscles / Hips
Psoas major
- Hips
- Hip & gluteal
- Deep layer
Part of Iliopsoas.
Anatomy
- Origin
- Sides of the T12-L5 vertebral bodies and discs; transverse processes of all lumbar vertebrae
- Insertion
- Lesser trochanter of the femur
- Nerve
- Anterior rami of lumbar spinal nerves (L1-L3)
Actions
- Flexes the hip
- Laterally flexes the lumbar spine
- Active in upright sitting and frontal-plane spinal stabilisation
Notes
- The lumbar plexus forms within the muscle.
References (5)
- Andersson E, Oddsson L, Grundström H, Thorstensson A. Scand J Med Sci Sports. 1995;5(1):10-16. The role of the psoas and iliacus muscles for stability and movement of the lumbar spine, pelvis and hip
- Standring S, ed. Elsevier. Gray's Anatomy: The Anatomical Basis of Clinical Practice. 42nd ed.
- Dalley AF, Agur AMR. Wolters Kluwer. Moore's Clinically Oriented Anatomy. 9th ed.
- Neumann DA. Elsevier. Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation. 3rd ed.
- Betts JG, Young KA, Wise JA, et al. OpenStax (free, openly licensed textbook). Anatomy and Physiology 2e