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 can be considered an inferior subdivision of the iliolumbar ligament).^[2]

Research

According to a cadaveric study, the 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 .