Quadratus Lumborum Anatomy: Origin, Insertion & Action

⭐ Quadratus Lumborum Muscle Anatomy ⭐
💪 Origin: Inner lip of iliac crest and the iliolumbar ligament.
💪 Insertion: Twelfth rib and the transverse processes of vertebra L1-L4.
💪 Action: Can assist with inspiration by bracing the twelfth rib, bilateral contraction can assist with extension of the trunk, unilateral contraction can assist with lateral flexion of the trunk and it can also weakly assist with stabilization of spine and pelvis.
💪 Nerve: 12th thoracic intercostal nerve, iliohypogastric nerve and the ilioinguinal nerve.
💪 Artery: Lumbar arteries and a lumbar branch of the iliolumbar artery.

Chapters:
0:00 - Intro
0:13 - Location & overview of the quadratus lumborum
1:25 - Origin of the quadratus lumborum
2:09 - Insertion of the quadratus lumborum
2:54 - Actions of the quadratus lumborum

⭐ Want to learn more about the quadratus lumborum? Then check out the full article on the Bodyworks Prime website: https://bodyworksprime.com/quadratus-...

⭐ If you would like some help memorising the quadratus lumborum's information then be sure to check out the free flashcards here: https://bodyworksprime.com/quadratus-...

⭐ The quadratus lumborum biomechanics study I mentioned in the video by S Phillips, S Mercer, and N Bogduk can be found here: https://journals.sagepub.com/doi/epdf...

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