Iliocostalis Lumborum Muscle Yoga Anatomy


Where Is the Iliocostalis Lumborum?

A long muscle  that runs from the ribs down the spine and around the tailbone.

What are the Symptoms of a Iliocostalis Lumborum Tear or strain?

  • Pain in the low back
  • Pain concentrated in the buttock
  • Occasionally pain in the low abdomen

Causes of pain

  • Bending and twisting when lifting
  • Straining when trying to lift something too heavy
  • Whiplash of the lower back
  • Extended periods of sitting in a car or plane


What is The Function of the Iliocostalis Lumborum?

This muscle extends and laterally flexes the thoracolumbar spine.

  • Straightens the back
  • Bends the back side to side
  • Twists the back side to side
  • Shifts the pelvis side to side


Origin and Insertion of Iliocostalis Lumborum


It originates from the common origin of the erector spinae muscles, which includes the following:

Spinous processes and supraspinous ligament of T11 through L5 (supraspinous ligament ends between L2 and L4)

Median sacral crest

Sacrotuberous ligament

Long posterior sacroiliac ligament

Lateral sacral crest

Posteromedial iliac crest


Attaches onto the posterior and inferior surfaces of the angles of the lower six to nine ribs.



Stretches for Iliocostalis Lumborum

Strengthen the Iliocostalis Lumborum

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Strengthen the Iliocostalis Lumborum

Strengthen the Iliocostalis LumborumStrengthen the Iliocostalis Lumborum