Quadratus Lumborum muscle

Origin of Quadratus Lumborum

Iliac crest and iliolumbar ligament.

Insertion of Quadratus Lumborum

Last rib and transverse processes of lumbar vertebrae.

Muscle Action/Function of Quadratus Lumborum

Alone(unilateral), lateral flexion of vertebral column; Together (bilateral), depression of thoracic rib cage.

Arterial (Blood) Supply of Quadratus Lumborum

Lumbar arteries, lumbar branch of iliolumbar artery.
quadratus lumborum muscle, anatomy, muscle picture

Quadratus Lumborum Video

Quadratus Lumborum (QL) Muscle

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