A Comparison Study of Egocentric and Allocentric Visual Feedback for Motor-Imagery Brain-Computer Interfaces
A Comparison Study of Egocentric and Allocentric Visual Feedback for Motor-Imagery Brain-Computer Interfaces
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DOI：
10.1109/smc53654.2022.9945431
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发表时间：
2022-10
期刊：
影响因子：
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通讯作者：
D. L. Davis;M. Nakanishi;T. Jung
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文献类型：
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作者：
D. L. Davis;M. Nakanishi;T. Jung
基于运动想象（MI）的脑机接口（BCI）已被研究作为改善康复和恢复以及增强现有功能的应用。MI BCI系统通常以自我为中心而不是以非自我为中心的参考系提供反馈。本研究的目的是看看是否呈现刺激在一个allocentric参考框架是可比的自我中心的刺激。我们使用动态视觉刺激在自我中心和allocentric参考框架，以诱导运动想象在虚拟现实（VR）环境中。八名参与者想象用左手和右手抓握动作，同时观察自我中心或非自我中心的刺激。的allocentric和自我中心的参考框架任务具有可比的评价者间的协议和精度，表明allocentric视觉反馈是有效的自我中心的MI BCI。
Motor imagery (MI) based brain-computer interfaces (BCIs) have been studied as applications for the improving rehabilitation and recovery, as well as augmenting existing function. MI BCI systems typically provide feedback in an egocentric rather than an allocentric reference frame. This study aims to see if presenting stimuli in an allocentric reference frame is comparable to presenting egocentric stimuli. We used dynamic visual stimuli in egocentric and allocentric reference frames to induce motor imagery in a virtual reality (VR) environment. Eight participants imagined grasping actions with their left and right hands while observing egocentric or allocentric stimuli. The allocentric and egocentric reference frame tasks had comparable inter-rater agreement and precision, indicating that allocentric visual feedback is as effective as egocentric one for MI BCI.