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The sacroiliac part of the iliolumbar ligament

Published online by Cambridge University Press:  23 October 2001

A. L. POOL-GOUDZWAARD ,
G. J. KLEINRENSINK ,
C. J. SNIJDERS ,
C. ENTIUS  and
R. STOECKART
A. L. POOL-GOUDZWAARD
Affiliation:
Department of Anatomy, Erasmus University Rotterdam Medical Center Impact Zoetermeer, The Netherlands
G. J. KLEINRENSINK
Affiliation:
Department of Anatomy, Erasmus University Rotterdam
C. J. SNIJDERS
Affiliation:
Department of Biomedical Physics and Technology, Erasmus University Rotterdam
R. STOECKART
Affiliation:
Department of Anatomy, Erasmus University Rotterdam
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Abstract

The iliolumbar ligament has been described as the most important ligament for restraining movement at the lumbosacral junction. In addition, it may play an important role in restraining movement in the sacroiliac joints. To help understand its presumed restraining effect, the anatomy of the ligament and its orientation with respect to the sacroiliac joints were studied in 17 cadavers. Specific dissection showed the existence of several distinct parts of the iliolumbar ligament, among which is a sacroiliac part. This sacroiliac part originates on the sacrum and blends with the interosseous sacroiliac ligaments. Together with the ventral part of the iliolumbar ligament it inserts on the medial part of the iliac crest, separate from the interosseous sacroiliac ligaments. Its existence is verified by magnetic resonance imaging and by cryosectioning of the pelvis in the coronal and transverse plane. Fibre direction, length, width, thickness and orientation of the sacroiliac part of the iliolumbar ligament are described. It is mainly oriented in the coronal plane, perpendicular to the sacroiliac joint. The existence of this sacroiliac part of the iliolumbar ligament supports the assumption that the iliolumbar ligament has a direct restraining effect on movement in the sacroiliac joints.

Keywords

Biomechanicssacroiliac jointlow back pain
Type
Papers
Information
The Journal of Anatomy , Volume 199 , Issue 4 , October 2001 , pp. 457 - 463
Copyright
© Anatomical Society of Great Britain and Ireland 2001

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