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Medical Term:

lateral arcuate ligament


Definition: a thickening of the fascia of the quadratus lumborum muscle between the transverse process of the first lumbar vertebra and the twelfth rib on either side that gives attachment to a portion of the diaphragm.

Synonym(s): ligamentum arcuatum lateraleTA, arcus lumbocostalis lateralis, lateral lumbocostal arch