Lateral arcuate ligament

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Lateral arcuate ligament
The diaphragm. Under surface. (Lat. arcuate ligament visible at bottom left.)
Latin ligamentum arcuatum laterale
Gray's subject #117 405
Dorlands/Elsevier l_09/12491634

The lateral arcuate ligament (also lateral lumbocostal arch) is a ligament under the diaphragm that arches across the upper part of the quadratus lumborum.


The lateral arcuate ligament runs from the front of the transverse process of the first lumbar vertebra, and, laterally, to the tip and lower margin of the twelfth rib. It forms an arch over the quadratus lumborum muscle.

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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.