Lumbosacral ligament | |
---|---|
![]() Articulations of
pelvis, anterior view (lumbosacral ligament labeled at center top). | |
Details | |
Identifiers | |
Latin | ligamentum lumbosacrale [1] |
Anatomical terminology |
The lumbosacral ligament or lateral lumbosacral ligament is a ligament that helps to stabilise the lumbosacral joint. The ligament's medial attachment is at (the inferior border of) transverse process of lumbar vertebra L5; its lateral attachment is at the ala of sacrum. [2]
The lumbosacral ligament extends obliquely inferior-ward from its medial attachment. Superiorly, it is partially continuous with the inferior margin of the iliolumbar ligament [2] (the lumbosarcal ligament be considered an inferior subdivision of the iliolumbar ligament). [1]
According to a cadaveric study, lumbosacral ligament forms a roof of a lumbosacral tunnel which is traversed by the (ipsilateral) lumbar spinal nerve L5; the tunnel may be the site of extraforaminal nerve entrapment due to mass effect of local pathologies. [3]