Lateral arcuate ligament
|Lateral arcuate ligament|
The diaphragm. Under surface. (Lat. arcuate ligament visible at bottom left.)
|Latin||ligamentum arcuatum laterale|
The lateral arcuate ligament (also lateral lumbocostal arch and external arcuate ligament) is a ligament under the diaphragm that arches across the upper part of the quadratus lumborum muscle. It is traversed by the subcostal nerve, artery and vein.
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.
Although the lateral arcuate ligament is commonly described in anatomy textbooks as attaching at the first lumbar vertebra (L1) other instances have been found in cadaver studies with attachments at either the second (L2) or third (L3) lumbar vertebra.
In some people (~5%) inferolateral extensions of the lateral arcuate ligaments present as thickened nodular areas adjacent to the lateral diaphragmatic surface which can be visualized with computed tomography (CT) scans.
- Deviri E, Nathan H, Luchansky E (1988). "Medial and lateral arcuate ligaments of the diaphragm: attachment to the transverse process". Anat Anz 166 (1-5): 63–7. PMID 3189849.
- Silverman PM, Cooper C, Zeman RK (1992). "Lateral arcuate ligaments of the diaphragm: anatomic variations at abdominal CT". Radiology 185 (1): 105–8. doi:10.1148/radiology.185.1.1523290. PMID 1523290.
- Galen, Singer C (Trans.) "Galen on anatomical procedures: de Anatomicis administrationibus", Oxford University Press, 1956, p143.
- Derenne JP, Debru A, Grassino AE, Whitelaw WA (1995). "History of diaphragm physiology: the achievements of Galen". Eur. Respir. J. 8 (1): 154–60. doi:10.1183/09031936.95.08010154. PMID 7744182.
- Anatomy figure: 40:04-10 at Human Anatomy Online, SUNY Downstate Medical Center - "The abdominal surface of the diaphragm."
- posteriorabdomen at The Anatomy Lesson by Wesley Norman (Georgetown University) (posteriorabdmus&nerves)
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