What is the insertion point for the quadratus lumborum?

The quadratus lumborum is a deep muscle of the posterior abdominal wall that plays a crucial role in stabilizing the pelvis and spine. Its correct insertion point includes the 12th rib and the transverse processes of the upper four lumbar vertebrae. This anatomical placement allows the quadratus lumborum to assist in lateral flexion of the spine, as well as contributing to stabilizing the rib cage during breathing and movements.

Understanding this muscle's insertion is vital for sports massage practitioners, as it informs approaches to treatment and assessment of lower back tightness and dysfunction. Proper identification of muscle attachments is essential for targeting manual therapy techniques effectively and may help alleviate discomfort in athletes experiencing lumbar pain or stiffness.