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iliocostalis lumborum (muscle)

 

Definition: deep back (erector spinae) muscle; origin, posterior aspect of sacrum and thoracolumbar fascia; insertion, the angles of lower six ribs; action, extends, abducts, and rotates lumbar vertebrae; nerve supply, dorsal branches of thoracic and lumbar nerves.

Synonym(s): lumbar iliocostal muscle, musculus sacrolumbalis

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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