Quadratus Lumborum Muscle Flashcards

Flashcards are a great way to memorise information about the quadratus lumborum muscle. Test your knowledge of anatomy using the quadratus lumborum flashcards below.

Press a flash card to reveal the answer.

Origin

Inner lip of iliac crest & iliolumbar ligament

Insertion

12th rib & transverse processes vertebra L1-L4

Actions

  • Assists inspiration by bracing the 12th rib
  • Assist stabilization of spine/pelvis
  • Bilateral contraction: Assists with trunk extension
  • Unilateral contraction: Assists with trunk lateral flexion

Innervation

  • 12th thoracic intercostal nerve
  • Iliohypogastric nerve
  • Ilioinguinal nerve

Blood Supply

  • Lumbar arteries
  • A lumbar branch of the iliolumbar artery

Would you like to learn more about the quadratus lumborum muscle? Then check out the quadratus lumborum muscle article and video by clicking the link below:
Quadratus Lumborum Muscle Anatomy

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