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Muscles: Iliocostalis, Lumbar Division.

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Structure.

  • Origin: iliac crest.
  • Insertion: inferior border of ribs 7-12.

Function.

  • Concentric action: spinal extension, rotation and lateral flexion; maintain erect posture.
  • Eccentric action: spinal flexion, rotation, and lateral flexion.
  • Isometric action: stabilization of the spine.
  • Innervation: lumbar spinal nerves.
  • Arterial supply: intercostal and lumbar arteries.

Clinical Significance.

 

 

References

Biel, A. (2015). Trail guide to the body: A hands-on guide to locating muscles, bones and more.

Clark, M., Lucett, S., Sutton, B. G., & National Academy of Sports Medicine. (2014). NASM essentials of corrective exercise training. Burlington, MA: Jones & Bartlett Learning.

Jenkins, G., & Tortora, G. J. (2012). Anatomy and Physiology: From Science to Life, 3rd Edition International Stu. John Wiley & Sons.

Muscolino, J. E. (2017). The muscular system manual: The skeletal muscles of the human body.