青老年腰椎三维运动范围的实验研究

A Comparative Study of Three-dimensional Movements of Lumbar Spine in the Old and the Young People

通过对青老年组腰椎三维运动范围的比较研究，探讨老年人腰椎稳定性及其生物代偿性变化的成因。选取１５ 具新鲜成人男性尸体分为两组：青年组，２０～３０ 岁，７ 例；老年组，６０～７０ 岁，８ 例。切取腰椎（Ｌ１－Ｓ１），用加载系统和计算机图像处理系统测量Ｌ１－Ｓ１ 各节段的三维运动范围。结果：老年组腰椎三维运动范围较青年组有减少趋势，在前屈时ＮＺ有显著性差异。结论：老年人腰椎未因腰椎退变而失稳，稳定性反而加强，原因是腰椎退变刺激腰椎产生生物代偿性变化而重塑稳定。

This article is aimed at the differences in lumbar vertebral three dimensional movement and in stability between the old and the young people, and at the reasons which lead to the differences. Fifteen fresh adult male cadavers were divided into two groups: the young group, 20 30 years old, comprising 7 cases; the old group, 60 70 years old, 8 caes. Lumbar spine(L1 S1) was cut down. Three dimensional movements under a loading system were measured by a compute system. The result showed that the range of the motion of the old group was lower than that of the young group. It suggests that the lumbar spine of the old people is more stable than that of the young people. This may be associated with the degeneration of the lumbar vertebra, which arouses biocompensatory changes, so the lumbar spine becomes re stable.