Visual evoked potentials for attentional gating in a brain-computer interface.
Visual evoked potentials for attentional gating in a brain-computer interface.
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脑机接口中注意力门控的视觉诱发电位。
DOI：
10.1109/embc.2012.6346286
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Kamrunnahar,Mst
中科院分区：
文献类型：
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作者：
Geronimo,Andrew;Schiff,StevenJ;Kamrunnahar,Mst
对于利用视觉线索来指导用户的同步脑机接口（BCI）范式任务，计算机提取的神经信号代表自主调制和诱发反应。对于这些范例，诱发电位往往被忽视的伪影的来源。在本文中，我们提出的假设，提示启动，作为一种机制，注意门控，是预测的运动想象的表现，因此，一个可行的选择，自定步调（异步）脑机接口应用。我们近似注意的幅度特征的视觉诱发电位（VEP）的发现使用两种方法：尝试匹配的平均VEP模板，和组件匹配的VEP模板使用独立分量分析（伊卡）。使用模板对显示高与低固定水平的试验进行排名。我们的研究结果表明，主题固定，测量VEP反应，失败的预测成功的运动想象任务完成。BCI社区的影响和替代提示方法的可能性在结论中给出。
For synchronous brain-computer interface (BCI) paradigms tasks that utilize visual cues to direct the user, the neural signals extracted by the computer are representative of voluntary modulation as well as evoked responses. For these paradigms, the evoked potential is often overlooked as a source of artifact. In this paper, we put forth the hypothesis that cue priming, as a mechanism for attentional gating, is predictive of motor imagery performance, and thus a viable option for self-paced (asynchronous) BCI applications. We approximate attention by the amplitude features of visually evoked potentials (VEP)s found using two methods: trial matching to an average VEP template, and component matching to a VEP template defined using independent component analysis (ICA). Templates were used to rank trials that display high vs. low levels of fixation. Our results show that subject fixation, measured by VEP response, fails as a predictor of successful motor-imagery task completion. The implications for the BCI community and the possibilities for alternative cueing methods are given in the conclusions.