目的　探讨侧隐窝狭窄的原因及其横、矢径测量在腰椎管狭窄症的诊断意义。　方法　利用30例横断面、8例矢状面标本，观测侧隐窝、黄韧带、椎间盘等结构。　结果　（1）L3-5骨性侧隐窝矢径为（6.97±0.95）、（6.46±0.86）、（6.37±0.54）mm，盘黄间隙矢径为（7.21±0.82）、（7.20±0.79）、（7.01±0.59）mm；（2）椎间盘横径、矢径均存在性差，各椎体间的椎间盘也存在差异；黄韧带厚度、侧隐窝横径及矢径均无侧差，但黄韧带厚度存在性差，侧隐窝横径、矢径均无性差；（3）椎间盘前缘高度大于后缘, L4~5前、后缘高度之比较L5~S1小。　结论　⑴不同性别、不同腰椎间的形态数据存在显著差异；⑵椎间盘、黄韧带数据均可作为诊断侧隐窝狭窄的参考指标；⑶侧隐窝狭窄是导致腰椎管狭窄的一个重要因素。

Objective　To investigate the reasons of lateral recess stenosis and the diagnostic value of anatomic measurements on it.　Methods　38 lumbar spinal specimens were made sagittal and transverse sections. The morphologic characteristics concerning with lateral recess, ligamenta flava and intervertebral disc were measured and analyzed.　Results　(1) Sagittal diameters of lateral recess of L3-5  vertebrae were（6.97±0.95）,（6.46±0.86） and（6.37±0.54）mm,  respectively on section A, as well (7.21±0.82）, （7.20±0.79） and（7.01±0.59）mm on section C. (2) For different lumbar vertebrae, there was a significant sex difference for transverse diameter and sagittal diameter of intervertebral disc, thickness of ligamenta flava, but not for transverse diameter and sagittal diameter of lateral recess on transverse sections, while there was no significant difference for transverse and sagittal diameter of lateral recess and thickness of ligamenta flava for bilateral lumbar vertebrae. (3)The height of anterior border of disc was significantly higher than that of posterior border on sagittal sections, especially in L5 ~ S1. The rate between the height of anterior and posterior borders of disc was smaller at L4~L5 than that at L5~S1.　Conclusions　 ⑴There is a significant difference among different sexes and lumbar vertebrae for morphologic parameters. ⑵ Transverse diameter and sagittal diameter of intervertebral disc, thickness of ligamenta flava are valuable for evaluating of lateral recess stenosis. ⑶ The narrow of lateral recess is possible for inducing of lumbar spinal stenosis.