| 蒯声政,周文钰,廖振华,郭岱琦,刘伟强.两种躯干运动模型在五种日常活动下的运动学差异的对比研究[J].中国康复医学杂志,2017,(6):661~666 |
| 两种躯干运动模型在五种日常活动下的运动学差异的对比研究 点此下载全文 |
| 蒯声政 周文钰 廖振华 郭岱琦 刘伟强 |
| 清华大学机械工程系，北京100084 |
| 基金项目：深圳市科技计划项目（CXZZ20130321163655111）；广东省科技计划项目（2014A020212655）；深圳市行业公共技术服务平台资金项目（SMJKPT20140417010001）；深圳市科技计划基础研究项目（JCYJ20151030160526024） |
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| 摘要： |
| 摘要
目的：比较五种日常活动下，由胸节段、腰部全节段构成的简略躯干模型与由胸节段、上腰节段、下腰节段构成的细化躯干模型的运动学差异性。
方法：使用NDI运动捕捉系统，采集26名健康的年轻志愿者在水平行走，上楼梯，躯干前屈，同侧拾取物体，对侧拾取物体五种活动下的胸节段，上腰节段，下腰节段和全腰节段的运动学参数。采用主成分分析的方法，分析三节段细化躯干模型和两节段简略躯干模型运动学参数的主成分的贡献率与载荷系数。
结果：简略躯干模型中，全腰段的屈曲角度和侧弯角度显著高于胸节段，细化躯干模型中，下腰段的屈曲角度和侧弯角度显著高于其他节段。在水平行走和上楼梯活动中，细化模型中的腰部两节段的载荷系数符号相反。
结论：躯干的运动主要是由腰部提供且主要是由下腰部分提供。在某些活动中，腰部节段间的运动出现了相互抵消的作用。因此，在进行躯干的运动分析时，需要对躯干进行细分成多节段，尤其要注意对腰部的细分。 |
| 关键词：日常活动，躯干运动模型，主成分分析，运动学 |
| Comparison of two kinematic trunk models in five activities of daily living Download Fulltext |
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| LeeShau Kee Science and Technology Building, Dept. of Mechanical Engineering Tsinghua University, Beijing，100084 |
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| Abstract
Objective: To compare the kinematic difference of two trunk models during five activities of daily living. The two models are trunk model composed of thoracic segment, upper lumbar segment and lower lumbar segment and simplified trunk model composed of thoracic segment and the whole lumbar segment.
Method: Twenty-six young healthy adults performed level walking, stair climbing, trunk flexion, flexing to pick up an object in front of the ipsilateral feet and flexing to pick up an object in front of the contralateral feet. The kinematic data were collected using motion capture system NDI. This study applied principal component analysis to investigate variance accounted for(VAF degree of contribution) and load coefficient of the two trunk models.
Result: The flexion angle and the lateral bending angle of the whole lumbar segment are both significantly higher than thoracic segment in simplified trunk model while the flexion angle and the lateral bending angle of lower lumbar segment are both significantly higher than the others in subdivided trunk model. In addition, the load coefficient of two lumbar segments in subdivided trunk model are opposite in sign.
Conclusion: The main motion of trunk is lumbar and the main motion segment of lumbar is lower lumbar segment. During some activities of daily living, the two lumbar segments have intersegmental counteraction. Therefore, it is essential to subdivide trunk segment, especially lumbar segment, into multiple segments when analyze the kinematic character of trunk motion. |
| Keywords:activity of daily living trunk motion model principal component analysis kinematics |
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