Artificial Redirection of Sensation From Prosthetic Fingers to the Phantom Hand Map on Transradial Amputees: Vibrotactile Versus Mechanotactile Sensory Feedback
Artificial Redirection of Sensation From Prosthetic Fingers to the Phantom Hand Map on Transradial Amputees: Vibrotactile Versus Mechanotactile Sensory Feedback
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DOI：
10.1109/tnsre.2012.2217989
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发表时间：
2013-01-01
影响因子：
4.9
通讯作者：
Cipriani, Christian
中科院分区：
文献类型：
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作者：
Antfolk, Christian;D'Alonzo, Marco;Cipriani, Christian
这项工作评估的能力transradial截肢者区分多部位触觉刺激的感觉歧视任务。它比较了不同的感觉反馈模式，使用假手假体：1）模态匹配的范例，其中记录在手的五个指尖上的压力被反馈作为对残肢上的五个目标点的压力刺激;和2）模态失配的范例，其中压力被转化为机械振动并反馈。8名经桡动脉截肢者参加了这项研究，并根据其体模图的完整性分为两组; A组在残肢上有完整的体模图，而B组有不完整或不存在的体模图。在本地化刺激的能力进行了比较，10个健康受试者使用的振动反馈和11个健康受试者使用的压力反馈（在以前的研究），在他们的前臂，在类似的实验。结果表明，在多部位感觉反馈辨别中，压力刺激优于振动触觉刺激。此外，我们证明，主题与详细的幻影地图有最好的歧视性能，甚至超过了健康的参与者的反馈模式，而组B的整体表现最差。最后，我们表明，放置在一个完整的幻影地图上的反馈设备，提高了多站点的感觉反馈歧视，独立的反馈方式。
This work assesses the ability of transradial amputees to discriminate multi-site tactile stimuli in sensory discrimination tasks. It compares different sensory feedback modalities using an artificial hand prosthesis in: 1) a modality matched paradigm where pressure recorded on the five fingertips of the hand was fed back as pressure stimulation on five target points on the residual limb; and 2) a modality mismatched paradigm where the pressures were transformed into mechanical vibrations and fed back. Eight transradial amputees took part in the study and were divided in two groups based on the integrity of their phantom map; group A had a complete phantom map on the residual limb whereas group B had an incomplete or nonexisting map. The ability in localizing stimuli was compared with that of 10 healthy subjects using the vibration feedback and 11 healthy subjects using the pressure feedback (in a previous study), on their forearms, in similar experiments. Results demonstrate that pressure stimulation surpassed vibrotactile stimulation in multi-site sensory feedback discrimination. Furthermore, we demonstrate that subjects with a detailed phantom map had the best discrimination performance and even surpassed healthy participants for both feedback paradigms whereas group B had the worst performance overall. Finally, we show that placement of feedback devices on a complete phantom map improves multi-site sensory feedback discrimination, independently of the feedback modality.