lumbar quadrate muscle n.
A muscle with origin from the iliac crest, the iliolumbar ligament, and the lower lumbar vertebrae, with insertion into the twelfth rib and the upper lumbar vertebrae, with nerve supply from the upper lumbar nerve, and whose action abducts the trunk. Also called quadrate muscle of loins.
- Lumbar rheumatism
lumbar rheumatism n. See lumbago.
- Lumbar rib
lumbar rib n. A rib articulating with the transverse process of the first lumbar vertebra; occurring only occasionally.
- Lumbar splanchnic nerve
lumbar splanchnic nerve n. Any of the branches from the lumbar sympathetic trunks that pass anteriorly to join the celiac, intermesenteric, aortic, and superior hypogastric plexuses.
- Lumbar triangle
lumbar triangle n. An area in the posterior abdominal wall, the site of occasional herniation, bounded by the edges of the latissimus dorsi and external oblique muscles and the iliac crest. Also called Petit’s lumbar triangle.