Supplemental vibrotactile feedback control of stabilization and reaching actions of the arm using limb state and position error encodings.
Supplemental vibrotactile feedback control of stabilization and reaching actions of the arm using limb state and position error encodings.
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DOI：
10.1186/s12984-017-0248-8
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发表时间：
2017-05-02
影响因子：
5.1
通讯作者：
Scheidt RA
中科院分区：
文献类型：
--
作者：
Krueger AR;Giannoni P;Shah V;Casadio M;Scheidt RA
运动感觉（肢体位置和运动感觉）的缺陷通常限制感觉运动功能及其在神经运动损伤后的恢复。提供合成动觉反馈的感觉替代技术可能会重新建立或增强动觉受损人群目标导向行为的闭环控制。作为实现这一目标的第一步，我们评估了未受损的人使用振动触觉感觉替代来提高稳定性和达到任务的能力。通过两个实验，我们比较了客观和主观效用的两种形式的补充反馈-肢体状态信息或手的位置错误-消除手的位置漂移，这自然发展稳定任务后，消除视觉反馈。实验1优化了肢体状态反馈的编码;最佳形式包括手的位置和速度信息，但对位置反馈的权重要大得多。在实验2中比较最佳肢体状态反馈与手位置误差反馈后，我们发现这两种编码方案都能够在没有视觉的情况下提高稳定性和达到性能。然而，错误编码产生了上级结果-客观和主观-由于它包含的额外的任务相关信息。本研究的结果已经建立了两种形式的振动触觉动觉反馈的即时效用和相对优点，在提高稳定性和达到与手臂和手的神经典型的人进行的行动。这些发现可以指导未来的发展，振动触觉感觉替代技术，以改善神经运动损伤后的感觉运动功能的幸存者谁保留运动能力，但缺乏本体感觉完整性，在他们更受影响的arm. The在线版本的这篇文章（doi：10.1186/s12984-017-0248-8）包含补充材料，这是提供给授权用户。
Deficits of kinesthesia (limb position and movement sensation) commonly limit sensorimotor function and its recovery after neuromotor injury. Sensory substitution technologies providing synthetic kinesthetic feedback might re-establish or enhance closed-loop control of goal-directed behaviors in people with impaired kinesthesia. As a first step toward this goal, we evaluated the ability of unimpaired people to use vibrotactile sensory substitution to enhance stabilization and reaching tasks. Through two experiments, we compared the objective and subjective utility of two forms of supplemental feedback – limb state information or hand position error – to eliminate hand position drift, which develops naturally during stabilization tasks after removing visual feedback. Experiment 1 optimized the encoding of limb state feedback; the best form included hand position and velocity information, but was weighted much more heavily toward position feedback. Upon comparing optimal limb state feedback vs. hand position error feedback in Experiment 2, we found both encoding schemes capable of enhancing stabilization and reach performance in the absence of vision. However, error encoding yielded superior outcomes - objective and subjective - due to the additional task-relevant information it contains. The results of this study have established the immediate utility and relative merits of two forms of vibrotactile kinesthetic feedback in enhancing stabilization and reaching actions performed with the arm and hand in neurotypical people. These findings can guide future development of vibrotactile sensory substitution technologies for improving sensorimotor function after neuromotor injury in survivors who retain motor capacity, but lack proprioceptive integrity in their more affected arm. The online version of this article (doi:10.1186/s12984-017-0248-8) contains supplementary material, which is available to authorized users.