Wentink Eva C, Talsma-Kerkdijk Eline J, Rietman Hans S, Veltink Peter
MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, The Netherlands
MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, The Netherlands.
Prosthet Orthot Int. 2015 Jun;39(3):255-9. doi: 10.1177/0309364613520319. Epub 2014 Feb 11.
Several studies have shown that feedback in upper-leg prostheses is possible, but slow or difficult to interpret. In this study, electrotactile and auditive error-based feedback, only giving feedback when an undesired event occurs, were tested for its use in upper-leg prosthesis when provided during a perturbation.
A total of nine healthy subjects walked on a prosthetic simulator which was disturbed at the end of the swing phase. They received either no feedback, electrotactile feedback, or auditive feedback at the time of the perturbation.
The reaction time of the subjects only improved by 40 ms when using auditory feedback, compared to the no-feedback condition. No changes in reaction time were found in the electrotactile feedback condition. Considering perturbation detection was not taken into account in this study, this improvement is not enough for practical applications in upper-leg prosthesis.
Many transfemoral amputees are insecure about their prosthesis, are afraid of falling, or actually fall. Providing feedback specifically during a perturbation may prevent them from falling, or at least give them a chance to react.
多项研究表明，大腿假肢的反馈是可行的，但反馈速度缓慢或难以解读。在本研究中，基于电触觉和听觉错误的反馈（仅在出现不良事件时提供反馈）在大腿假肢受到扰动时的应用效果得到了测试。
共有9名健康受试者在假肢模拟器上行走，该模拟器在摆动期结束时受到干扰。在受到扰动时，他们分别接受无反馈、电触觉反馈或听觉反馈。
与无反馈条件相比，使用听觉反馈时受试者的反应时间仅缩短了40毫秒。在电触觉反馈条件下，未发现反应时间有变化。鉴于本研究未考虑扰动检测，这种改善对于大腿假肢的实际应用而言是不够的。
许多经大腿截肢者对其假肢感到不安全，害怕摔倒，或者实际发生了摔倒。在受到扰动时专门提供反馈可能会防止他们摔倒，或者至少给他们一个做出反应的机会。
