2023年10月30日 · 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 1st to 4th lumbar vertebrae. All fibers together give the muscle a rectangular appearance.

The Quadratus Lumborum (QL) is the deepest back muscle and 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 flattened and has a quadrangular shape.

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 back muscle.

2024年7月17日 · Understanding the latest anatomical and clinical information on the quadratus lumborum is essential for treating various musculoskeletal conditions of the lower back. Anatomy. The quadratus lumborum is an integral part of the thoracolumbar fascia, a myofascial system that covers the posterior trunk and involves parts of the lower and upper limbs.

2023年1月5日 · 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. Attachments: Originates from the iliac crest and iliolumbar ligament.

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

2024年1月11日 · Gross anatomy Relations. The muscle is a thick, irregular, quadrilateral-shaped muscle sheet that lies in the posterior abdominal wall on each side of the lumbar vertebrae. It is superficial to the psoas major muscle. Anterior relations include: colon. kidney. psoas muscle (major and minor) diaphragm. subcostal, ilioinguinal and iliohypogastric ...

Origin: Iliac crest and iliolumbar ligament. Insertion: Last rib and transverse processes of lumbar vertebrae. Artery: Lumbar arteries, Iliolumbar artery. Nerve: Anterior branches of T12, L1, L2, L3, L4. Action: Alone: lateral flexion of vertebral column; Together: depression of thoracic rib cage.

Understanding its origin, insertion, muscle path, and function is vital in comprehending its role in human anatomy and biomechanics. Origin and Insertion: The quadratus lumborum muscle is a quadrilateral-shaped muscle, as the name suggests, located in the posterior abdominal wall.

The quadratus lumborum muscle, abbreviated as the ‘QL muscle’, is located deep within the lower back musculature towards the posterior of the body. It is classified as a muscle of the posterior abdominal wall and is located dorsally to the iliopsoas muscle.