The clinical relevance of advanced artificial feedback in the control of a multi-functional myoelectric prosthesis.
The clinical relevance of advanced artificial feedback in the control of a multi-functional myoelectric prosthesis.
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DOI：
10.1186/s12984-018-0371-1
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发表时间：
2018-03-27
影响因子：
5.1
通讯作者：
Dosen S
中科院分区：
文献类型：
--
作者：
Markovic M;Schweisfurth MA;Engels LF;Bentz T;Wüstefeld D;Farina D;Dosen S
为了有效地取代人手，假肢应该无缝地响应用户的意图，但也要将感官信息传递回用户。恢复的感觉反馈评价很高的假肢用户，反馈是至关重要的，在健全的主体把握。尽管如此，反馈在假肢中的好处仍然存在争议。缺乏共识可能是由于假肢控制期间感觉反馈的复杂性质，因此其有效性取决于多个因素（例如，任务复杂性、用户学习）。我们评估了这些因素的影响，在六个截肢者的纵向评估，使用临床设置（插座，嵌入式控制）和一系列的任务（框和块，块转，衣夹和杯子搬迁）。为了提供反馈，我们提出了一种新的振动触觉刺激方案，能够从多功能假肢传输多个变量。受试者戴着一个手镯，手镯上有四个两个均匀放置的振动触觉器，提供有关接触、假体状态（主动功能）和抓握力的信息。受试者还完成了一份问卷，对反馈进行主观评价。测试表明，反馈是有益的，只有在复杂的任务（块转，衣夹和杯子搬迁），培训有一个重要的，任务相关的影响。在衣夹移位和原地转弯任务中，训练使受试者能够建立成功的前馈控制，因此，反馈变得多余。然而，在杯子重新定位的任务中，受试者需要一些训练来学习如何正确地利用反馈。无论客观效益如何，对反馈的主观评价始终是积极的。这些结果强调了闭环假体控制的多面性，因为根据上下文，相同的反馈界面可以对性能产生不同的影响。最后，即使闭环控制没有改善性能，它也可能是有益的，因为它似乎改善了主观体验。因此，在这项研究中，我们证明，第一次，先进的，多变量的反馈接口的相关性，灵巧，多功能假体控制在临床相关的设置。本文的在线版本（10.1186/s12984-018-0371-1）包含补充材料，可供授权用户使用。
To effectively replace the human hand, a prosthesis should seamlessly respond to user intentions but also convey sensory information back to the user. Restoration of sensory feedback is rated highly by the prosthesis users, and feedback is critical for grasping in able-bodied subjects. Nonetheless, the benefits of feedback in prosthetics are still debated. The lack of consensus is likely due to the complex nature of sensory feedback during prosthesis control, so that its effectiveness depends on multiple factors (e.g., task complexity, user learning). We evaluated the impact of these factors with a longitudinal assessment in six amputee subjects, using a clinical setup (socket, embedded control) and a range of tasks (box and blocks, block turn, clothespin and cups relocation). To provide feedback, we have proposed a novel vibrotactile stimulation scheme capable of transmitting multiple variables from a multifunction prosthesis. The subjects wore a bracelet with four by two uniformly placed vibro-tactors providing information on contact, prosthesis state (active function), and grasping force. The subjects also completed a questionnaire for the subjective evaluation of the feedback. The tests demonstrated that feedback was beneficial only in the complex tasks (block turn, clothespin and cups relocation), and that the training had an important, task-dependent impact. In the clothespin relocation and block turn tasks, training allowed the subjects to establish successful feedforward control, and therefore, the feedback became redundant. In the cups relocation task, however, the subjects needed some training to learn how to properly exploit the feedback. The subjective evaluation of the feedback was consistently positive, regardless of the objective benefits. These results underline the multifaceted nature of closed-loop prosthesis control as, depending on the context, the same feedback interface can have different impact on performance. Finally, even if the closed-loop control does not improve the performance, it could be beneficial as it seems to improve the subjective experience. Therefore, in this study we demonstrate, for the first time, the relevance of an advanced, multi-variable feedback interface for dexterous, multi-functional prosthesis control in a clinically relevant setting. The online version of this article (10.1186/s12984-018-0371-1) contains supplementary material, which is available to authorized users.
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影响因子：
5.1
作者：
Dosen S;Markovic M;Somer K;Graimann B;Farina D
通讯作者：
Farina D
DOI：
10.1109/tnsre.2014.2371238
发表时间：
2015-03-01
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DOI：
10.1109/tnsre.2016.2550864
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2017-03-01
影响因子：
4.9
作者：
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