Publisher's Synopsis
The quadratus lumborum is a large, deep muscle that spans your entire lower back. "Quadratus" translates to "square" in Latin, whereas "lumborum" alludes to the lower back. In this context, "quadratus lumborum" refers to the "square-shaped muscle of the lumbar region."
The quadratus lumborum is a large, flat muscle that helps stabilize and move the spine, sacrum, and rib cage. It begins at the iliac crest of the hip bone and terminates at the lowest rib and transverse processes of the lumbar vertebrae.
The quadratus lumborum primarily performs the following functions:
- Unilateral contraction (on one side) facilitates lateral bending of the vertebrae, which facilitates leaning and reaching laterally.
- When it contracts bilaterally (on both sides), it aides in extending or arching the lower back.
- It helps to stabilize the spine, pelvis, and ribcage during activities such as walking, standing, and lifting.
Lower back discomfort and postural abnormalities may result from the quadratus lumborum becoming overly tight or underdeveloped.
Performing exercises and stretches that target this muscle can help maintain a strong and flexible lower back. Consult a medical professional for a proper diagnosis and treatment if you are experiencing specific quadratus lumborum issues or symptoms.
