A Three-Dimensional Motion Model of Loads on the Lumbar Spine: II. Model Validation
A Three-Dimensional Motion Model of Loads on the Lumbar Spine: II. Model Validation
复制标题
腰椎负载的三维运动模型：II。
DOI：
10.1177/001872089103300202
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Carolyn M. Sommerich
中科院分区：
文献类型：
--
作者：
W. Marras;Carolyn M. Sommerich
已开发出三维运动模型，可在模拟手动材料搬运条件的实验室条件下估计腰椎上的负载。在一项实验中，11 名受试者经历了脊柱负荷，其中躯干速度、躯干扭矩输出和躯干不对称姿势的条件在一系列等速速度躯干伸展中发生变化。 10 块躯干肌肉的肌电活动、受试者人体测量学和躯干动力学被用作本研究第一部分中描述的生物力学模拟模型的输入。该模型在整个运动过程中连续计算腰椎压缩、剪切和扭转载荷的估计值，以及躯干产生的扭矩。将从该模型得出的躯干扭矩估计值与测量的躯干扭矩进行比较。讨论了模型估计的躯干运动、姿势和扭矩水平对脊柱负载的影响。结论是，这种方法提供了一种直接的方法来评估由于实验室模拟工作场所条件而造成的脊柱负载。
A three-dimensional motion model has been developed that estimates loads on the lumbar spine under laboratory conditions that simulate manual materials handling conditions. Eleven subjects experienced spinal loading during an experiment in which conditions of trunk velocity, trunk torque output, and trunk asymmetric posture were varied in a series of isokinetic velocity trunk extensions. The electromyographic activity of 10 trunk muscles, subject anthropometry, and trunk kinetics were used as input to a biomechanical simulation model described in Part I of this study. The model calculated estimates of compression, shear, and torsion loading in the lumbar spine, as well as the torque production of the trunk, continuously throughout the exertion. Trunk torque estimates derived from this model were compared with measured trunk torque. The effects of trunk motion, posture, and torque level on spine loading as estimated by the model are discussed. It was concluded that this approach provides a straightforward means of assessing loading of the spine attributable to laboratory simulations of workplace conditions.