Quadratus Lumborum
Description
Name
- Quadratus Lumborum
- QL muscle
- Deep low back lateral flexor
General
- Deep muscle of the lower back
- Helps with stabilization of the spine, lateral flexion
Origin
- Posterior border of Iliac Crest
Insertion
Actions
- Unilateral: lateral flexion of vertebral column
- Bilateral: depression of thoracic rib cage
Vascular supply
- Lumbar arteries
- Lumbar branch of iliolumbar artery
Innervation
- Ventral Rami of Thoracic (T12) and Lumbar (L1-L4) Nerves
Clinical Significance
See Also
References
- ↑ Grivas, Theodoros B., et al. "Idiopathic and normal lateral lumbar curves: muscle effects interpreted by 12th rib length asymmetry with pathomechanic implications for lumbar idiopathic scoliosis." Scoliosis and Spinal Disorders 11 (2016): 39-45.