Perception of Static Position and Kinesthesia of the Finger using Vibratory Stimulation.

Luis Vargas, He Helen Huang, Yong Zhu, Xiaogang Hu
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Abstract

Proprioception provides information regarding the state of an individual's limb in terms of static position and kinesthesia (dynamic movement). When such feedback is lost or impaired, the performance of dexterous control of our biological limbs or assistive devices tends to deteriorate. In this study, we determined if external vibratory stimulation patterns could allow for the perception of a finger's static position and kinesthesia. Using four tactors and two stimulus levels, eight vibratory settings corresponded to eight discrete finger positions. The transition patterns between these eight settings corresponded to kinesthesia. Three experimental blocks assessed the perception of a finger's static position, speed, and movement (amplitude and direction). Our results demonstrated that both position and kinesthesia could be recognized with over 93% accuracy. The outcomes suggest that vibratory stimulus can inform subjects of static and dynamic aspects of finger proprioception. This sensory stimulation approach can be implemented to improve outcomes in clinical populations with sensory deficits, and to enhance user experience when users interact with assistive devices.

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用振动刺激来感知手指的静态位置和动觉。
本体感觉提供了关于个体肢体静态位置和动觉(动态运动)状态的信息。当这种反馈丢失或受损时,我们对生物肢体或辅助设备的灵巧控制的表现往往会恶化。在这项研究中,我们确定了外部振动刺激模式是否可以允许感知手指的静态位置和动觉。使用四个因素和两个刺激水平,八个振动设置对应于八个离散的手指位置。这八种设置之间的转换模式对应于动觉。三个实验模块评估了对手指静态位置、速度和运动(幅度和方向)的感知。我们的结果表明,位置和动觉都可以识别,准确率超过93%。结果表明,振动刺激可以告知受试者手指本体感觉的静态和动态方面。这种感觉刺激方法可以用于改善临床感觉缺陷人群的结果,并增强用户与辅助设备交互时的用户体验。
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