The quadratus lumborum muscle, informally called the QL, is a paired muscle of the left and right posterior abdominal wall. It is the deepest abdominal muscle, and commonly referred to as a …

Oct 30, 2023 · Quadratus lumborum originates from the iliolumbar ligament and iliac crest. It runs craniomedially, attaching to the inferior border of 12th rib and the transverse processes of the …

The Quadratus Lumborum (QL) originates from the iliac crest and inserts on the transverse process of lumbar one through five and the lower part of the twelfth rib. The QL muscle is …

Learn about the quadratus lumborum muscle's origin, insertion, actions, and its role in trunk extension and lateral flexion.

Jul 17, 2024 · The quadratus lumborum is a posterior continuation of the transverse abdominal muscle, which is part of the anterior fascial system of the body, extending from the deep …

Jan 1, 1970 · The quadratus lumborum muscle starts at the pelvis and runs up to the lowest rib. It plays an essential role in stabilizing the pelvis when a person is upright. It also helps support …

Jan 5, 2023 · The quadratus lumborum is a muscle of the posterior abdominal wall. It is a thick muscular sheet, quadrilateral in shape, and positioned superficial to the psoas major.

Mar 19, 2025 · The quadratus lumborum (QL) is a deep muscle in the lower back that plays a crucial role in spinal stability and movement. Located on either side of the lumbar spine, it …

Occasionally a second portion of this muscle is found in front of the preceding. It arises from the upper borders of the transverse processes of the lower three or four lumbar vertebrae, and is …

Where is Quadratus Lumborum Pain Felt? You can see the pain referral patterns below for the deep (closer to the spine) and superficial fibers of the QL muscle. Referral from the quadratus …