Lumbosacral ligament explained

Lumbosacral ligament
Latin:	ligamentum lumbosacrale

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.^[1]

The lumbosacral ligament extends obliquely inferior-ward from its medial attachment. Superiorly, it is partially continuous with the inferior margin of the iliolumbar ligament (the lumbosarcal ligament be considered an inferior subdivision of the iliolumbar ligament).^[2]

Research

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]

Notes and References

1. Book: Palastanga N, Soames R . Anatomy and Human Movement: Structure and Function . Churchill Livingstone/Elsevier . 2012 . 978-0-7020-3553-1 . 6th . Physiotherapy Essentials . Edinburgh . 283–284.
2. Musil V, Blankova A, Baca V . A plea for an extension of the anatomical nomenclature: The locomotor system . Bosnian Journal of Basic Medical Sciences . 18 . 2 . 117–125 . May 2018 . 29144891 . 5988530 . 10.17305/bjbms.2017.2276 .
3. Transfeldt EE, Robertson D, Bradford DS . Ligaments of the lumbosacral spine and their role in possible extraforaminal spinal nerve entrapment and tethering . Journal of Spinal Disorders . 6 . 6 . 507–512 . December 1993 . 8130399 . 10.1097/00002517-199306060-00006 .