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首页> 外文期刊>Journal of Biomechanics >Moment-rotation responses of the human lumbosacral spinal column.
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Moment-rotation responses of the human lumbosacral spinal column.

机译：人腰s脊柱的瞬间旋转响应。

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摘要

The objective of this study was to test the hypothesis that the human lumbosacral joint behaves differently from L1-L5 joints and provides primary moment-rotation responses under pure moment flexion and extension and left and right lateral bending on a level-by-level basis. In addition, range of motion (ROM) and stiffness data were extracted from the moment-rotation responses. Ten T12-S1 column specimens with ages ranging from 27 to 68 years (mean: 50.6+/-13.2) were tested at a load level of 4.0 N m. Nonlinear flexion and extension and left and right lateral bending moment-rotation responses at each spinal level are reported in the form of a logarithmic function. The mean ROM was the greatest at the L5-S1 level under flexion (7.37+/-3.69 degrees) and extension (4.62+/-2.56 degrees) and at the L3-L4 level under lateral bending (4.04+/-1.11 degrees). The mean ROM was the least at the L1-L2 level under flexion (2.42+/-0.90 degrees), L2-L3 level under extension (1.58+/-0.63 degrees), and L1-L2 level under lateral bending (2.50+/-0.75 degrees). The present study proved the hypothesis that L5-S1 motions are significantly greater than L1-L5 motions under flexion and extension loadings, but the hypothesis was found to be untrue under the lateral bending mode. These experimental data are useful in the improved validation of FE models, which will increase the confidence of stress analysis and other modeling applications.
机译：这项研究的目的是检验以下假设：人腰s关节的行为与L1-L5关节不同，并且在纯力矩弯曲和伸展以及左右水平弯曲的基础上提供初级力矩旋转响应。此外，从力矩旋转响应中提取了运动范围（ROM）和刚度数据。在4.0 N m的载荷水平下测试了10个T27-S1柱标本，其年龄在27至68岁之间（平均：50.6 +/- 13.2）。以对数函数的形式报告了在每个脊柱水平上的非线性屈曲和伸展以及左右横向弯矩-旋转响应。平均ROM在屈曲（7.37 +/- 3.69度）和伸展（4.62 +/- 2.56度）下的L5-S1水平和横向弯曲（4.04 +/- 1.11度）的L3-L4水平上最大。 。平均ROM在屈曲下（2.42 +/- 0.90度）的L1-L2水平，伸展下（1.58 +/- 0.63度）的L2-L3水平和横向弯曲（2.50 + / -0.75度）。本研究证明了在弯曲和伸展载荷下L5-S1的运动明显大于L1-L5的运动的假设，但是在横向弯曲模式下发现该假设是不正确的。这些实验数据可用于改进有限元模型的验证，这将增加应力分析和其他建模应用程序的置信度。

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