Compressive loads in the lumbar vertebral column during normal level walking
Compressive loads in the lumbar vertebral column during normal level walking
复制标题
正常水平行走时腰椎的压缩负荷
DOI：
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发表时间：
1984
影响因子：
2.8
通讯作者：
A. Cappozzo
中科院分区：
文献类型：
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作者：
A. Cappozzo
在正常水平行走过程中，研究了一系列前进速度下作用于L3-L4脊柱运动节段的纵向压缩载荷。力的预测使用摄影测量的上半身节段运动和惯性特性的实验数据，沿着与躯干的生物力学模型。使用文献中的躯干肌肉电活动记录和椎间盘内压力信息对结果进行了部分验证。实验在5名正常青年男性受试者中进行。结果表明，L3-L4运动节段承受循环压缩载荷。该负荷的最大值和最小值随行走速度而变化，分别为体重的约1.0至2.5倍和0.8至0.2倍。相关峰值出现的频率范围约为1.3至2.5 Hz。肌肉活动主要集中在躯干伸肌，在同侧脚趾离地时，躯干伸肌会爆发性活动。
The longitudinal compressive load acting on the L3–L4 spinal motion segment was investigated during normal level walking for a range of speeds of progression. Forces were predicted using experimental data from photogrammetric measurements of upper body segmental motion and inertial properties, along with a biomechanical model of the trunk. A partial validation of the results was obtained using records of the electrical activity of the trunk muscles and intradiscal pressure information available in the literature. Experiments were carried out in five normal young male subjects. Results showed that the L3–L4 motion segment is subjected to cyclic compressive loads. The maximum and minimum values of this load vary with walking speed from approximately 1.0 to 2.5 and from 0.8 to 0.2 times body weight, respectively. Relevant peaks occur with a frequency ranging approximately from 1.3 to 2.5 Hz. Muscular action is mostly concentrated in the trunk extensors, which show a burst of activity at the time of ipsilateral toe‐off.