Muscle Name: Quadratus Lumborum
Medical Name:
- Quadratus Lumborum
Other Names:
- QL
Head:
- None (Single muscle)
Movement:
- Lateral flexion of the vertebral column
- Bending the torso to the side
- Extension of the lumbar spine (bilateral contraction)
- Straightening the torso
- Stabilization of the lumbar spine and pelvis
Attachment:
- Origin:
- Iliac crest
- Iliolumbar ligament
- Insertion:
- Inferior border of the 12th rib
- Transverse processes of L1-L4 vertebrae
Related Muscles:
- Erector Spinae
- Psoas Major
- Internal Oblique
- Transversus Abdominis