Anterior-posterior ground reaction forces as a measure of paretic leg contribution in hemiparetic walking
Anterior-posterior ground reaction forces as a measure of paretic leg contribution in hemiparetic walking
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DOI：
10.1161/01.str.0000204063.75779.8d
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发表时间：
2006-03-01
期刊：
影响因子：
8.3
通讯作者：
Kautz, SA
中科院分区：
文献类型：
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作者：
Bowden, MG;Balasubramanian, CK;Kautz, SA
背景和目的-中风后行走的特征是步态速度慢、耐力差、行走方式的质量和适应性降低以及不能协调双腿。基于机械功计算的估计表明，无论偏瘫的严重程度如何，瘫痪腿在步态周期中做了总机械功的30%至40%，但这些工作估计可能无法描述每条腿对向前推进的贡献。本研究的目的是建立一个可量化的偏瘫的严重程度和轻瘫腿的贡献，在步行过程中推进之间的联系，我们建议量化使用的前后地面反作用力（A-P GRFs）的基础上的措施。方法-共47名参与者慢性偏瘫走在自选速度收集时空参数和三维GRFs。一个16人的子集也参加了一个踏板协议比较A-P GRF措施，以建立措施的麻痹腿output.Results - A-P GRF措施与步行速度和偏瘫的严重程度。这些措施也密切相关的积极工作和净工作值在踏板任务。的百分比产生的麻痹腿（PP）的总推进计算和发现为16%，36%，和49%的那些与高，中，低偏瘫severity.Conclusion - PP被发现提供了一个定量的衡量的麻痹腿的协调输出。对这种向前推进措施的进一步研究可能会提供一种有效的工具来区分功能补偿和生理恢复。
Background and Purpose - Walking after stroke is characterized by slow gait speed, poor endurance, reduced quality and adaptability of walking patterns, and an inability to coordinate the legs. Estimates based on mechanical work calculations have suggested that the paretic leg does 30% to 40% of the total mechanical work over the gait cycle, regardless of hemiparetic severity, but these work estimates may not describe the contribution of each leg to forward propulsion. The purpose of this study was to establish a quantifiable link between hemiparetic severity and paretic leg contribution to propulsion during walking, which we propose to quantify using a measure based on the anterior-posterior ground reaction forces (A-P GRFs).Methods - A total of 47 participants with chronic hemiparesis walked at self-selected speeds to collect spatiotemporal parameters and 3D GRFs. A 16-person subset also participated in a pedaling protocol to compare A-P GRF measures to established measures of paretic leg output.Results - A-P GRF measures were correlated with both walking speed and hemiparetic severity. These measures were also strongly correlated with positive work and net work values obtained during the pedaling task. The percentage of total propulsion generated by the paretic leg (PP) was calculated and found to be 16%, 36%, and 49% for those with high, moderate, and low hemiparetic severity, respectively.Conclusion - PP was found to provide a quantitative measure of the coordinated output of the paretic leg. Further research on this measure of forward propulsion may lead to the provision of an effective tool for distinguishing functional compensation from physiological restitution.