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- Right click on the image for a downloadable file of this muscle.
- Use of this artwork requires proper credit to be given (Permission: Dr. Joe Muscolino. www.learnmuscles.com – art work Giovanni Rimasti)
- The quadratus lumborum attaches from the inferomedial border of the 12th rib and the transverse processes of L1-L4 to the posteromedial iliac crest.
- The quadratus lumborum elevates the same-side pelvis and anteriorly tilts the pelvis at the lumbosacral joint.
- It extends and laterally flexes the trunk at the spinal joints.
- It also depresses the 12th rib at the costovertebral joint.