The biomechanical functions of the iliolumbar ligament in maintaining stability of the lumbosacral junction

John C. Y. LEONG, Keith D. K. LUK, Hung Kay Daniel CHOW, C. W. WOO

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

The iliolumbar ligament is one of the three lumbopelvic ligaments. Recent study has shown that the ligament is not present at birth and is formed from metaplasia of the qua- dratus lumborum muscle at the end of the first decade. To study the biomechanical functions of this ligament, an apparatus was developed using linear variable differential transformers. Twenty fresh cadaveric specimens of the lumbosacral pelvis were tested. The flexibility of the intact lumbar segment was studied before and after the ligaments were divided. Flexion of L5 on S1 was mainly controlled by the posterior band and lateral bending by the anterior band of the ligament. When the L5-S1 disc was degenerated, total division of the ligaments reduced extension during loading. Its effect on torsion was not evident from this study. Copyright © 1987 Lippincott-Raven Publishers.

Original languageEnglish
Pages (from-to)669-674
JournalSpine
Volume12
Issue number7
DOIs
Publication statusPublished - Sep 1987

Citation

Leong, J. C. Y., Luk, K. D. K., Chow, D. H. K., & Woo, C. W. (1987). The biomechanical functions of the iliolumbar ligament in maintaining stability of the lumbosacral junction. Spine, 12(7), 669-674. doi: 10.1097/00007632-198709000-00005

Keywords

  • Iliolumbar ligament
  • Stability
  • Lumbosacral junction

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