Amputee perception of prosthetic ankle stiffness during locomotion.
Amputee perception of prosthetic ankle stiffness during locomotion.
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DOI：
10.1186/s12984-018-0432-5
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发表时间：
2018-11-08
影响因子：
5.1
通讯作者：
Rouse EJ
中科院分区：
文献类型：
--
作者：
Shepherd MK;Azocar AF;Major MJ;Rouse EJ
假肢脚是弹簧状的，它们的刚度严重影响穿着者的稳定性、舒适性和行走的能量消耗。尽管刚度在假肢中很重要，但处方过程通常需要测试有限数量的假肢，这可能导致患者接受力学性能不佳的足部。为了了解假体应单独优化的分辨率，我们试图描述膝下假体使用者对假体刚度的心理物理敏感性。我们使用了一种新的可变刚度踝关节假体来测量用户选择的首选刚度的可重复性，并实施了心理物理实验，以表征运动过程中刚度的差异。所有8名膝下截肢受试者在选择首选刚度时均表现出较高的可重复性（平均变异系数：14.2 ± 1.7%），并且能够正确识别踝关节刚度的7.7 ± 1.3%变化（准确率为75%）。这种高灵敏度表明，假足刚度应根据个人情况进行高精度调整。这些结果还强调了需要一对新的机器人处方工具和机械表征的假脚。
Prosthetic feet are spring-like, and their stiffness critically affects the wearer’s stability, comfort, and energetic cost of walking. Despite the importance of stiffness in ambulation, the prescription process often entails testing a limited number of prostheses, which may result in patients receiving a foot with suboptimal mechanics. To understand the resolution with which prostheses should be individually optimized, we sought to characterize below-knee prosthesis users’ psychophysical sensitivity to prosthesis stiffness. We used a novel variable-stiffness ankle prosthesis to measure the repeatability of user-selected preferred stiffness, and implemented a psychophysical experiment to characterize the just noticeable difference of stiffness during locomotion. All eight subjects with below-knee amputation exhibited high repeatability in selecting their Preferred Stiffness (mean coefficient of variation: 14.2 ± 1.7%) and were able to correctly identify a 7.7 ± 1.3% change in ankle stiffness (with 75% accuracy). This high sensitivity suggests prosthetic foot stiffness should be tuned with a high degree of precision on an individual basis. These results also highlight the need for a pairing of new robotic prescription tools and mechanical characterizations of prosthetic feet.
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DOI：
10.1109/tnsre.2014.2307256
发表时间：
2014-07
期刊：
IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society
影响因子：
--
作者：
Rouse EJ;Hargrove LJ;Perreault EJ;Kuiken TA
通讯作者：
Kuiken TA
影响因子：
1.5
作者：
Major, Matthew J.;Scham, Joel;Orendurff, Michael
通讯作者：
Orendurff, Michael
影响因子：
1.8
作者：
Fey, Nicholas P.;Klute, Glenn K.;Neptune, Richard R.
通讯作者：
Neptune, Richard R.
影响因子：
1.8
作者：
Major, Matthew J.;Twiste, Martin;Howard, David
通讯作者：
Howard, David
影响因子：
5.1
作者：
Ray, Samuel F.;Wurdeman, Shane R.;Takahashi, Kota Z.
通讯作者：
Takahashi, Kota Z.