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KMID : 1001920180610010089
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Journal of Korean Neurosurgical Society
2018 Volume.61 No. 1 p.89 ~ p.96
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Morphometric Study of the Lumbar Posterior Longitudinal Ligament
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Lee Sang-Beom
Chang Jae-Chil
Lee Gwang-Soo
Hwang Jae-Chan
Bae Hack-Gun
Doh Jae-Won
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Abstract
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Objective: Morphometric data for the lumbar posterior longitudinal ligament (PLL) was investigated to identify whether there is a difference in the morphometry of the PLL of the lumbar spine at each level with respect to the pattern of intervertebral disc displacement.
Methods: In 14 formalin-fixed adult cadavers (12 males and 2 females), from L1 to L5, the authors measured the width and height of the PLL and compared them with other landmarks such as the disc and the pedicle.
Results: Horizontally, at the upper margin of the disc, the central portion of the superficial PLL covered 17.8-36.9% of the disc width and the fan-like portion of the PLL covered 63.9-76.7% of the disc width. At the level of the median portion of the disc, the PLL covered 69.1-74.5% of the disc width. Vertically, at the level of the medial margin of the pedicle, the fan-like portion of the PLL covered 23.5-29.9% of the disc height. In general, a significant difference in length was not found in the right-left and male-female comparisons.
Conclusion: This study presents the morphometric data on the pattern of intervertebral disc displacement and helps to improve the knowledge of the surgical anatomy of the lumbar PLL.
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KEYWORD
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Longitudinal ligaments , Lumbar vertebrae , Cadaver , Intervertebral disc displacement
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