Investigating Evoked EEG Responses to Targets Presented in Virtual Reality
Investigating Evoked EEG Responses to Targets Presented in Virtual Reality
复制标题
研究对虚拟现实中呈现的目标的诱发脑电图反应
DOI：
10.1109/embc.2019.8856761
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Sajda, Paul
中科院分区：
文献类型：
--
作者：
Lapborisuth, Pawan;Faller, Josef;Koss, Jonathan;Waytowich, Nicholas R.;Touryan, Jonathan;Sajda, Paul
虚拟现实（VR）提供了在复杂的生态现实环境中研究大脑功能的潜力。然而，额外的自由度使分析更具挑战性，特别是在诱发神经反应方面。在本文中，我们设计了一个目标检测任务，在VR中，我们改变了目标的视角，通过一个三维迷宫的主题移动。我们研究了经典的P300诱发反应的潜伏期和形状如何随着将脑电图数据锁定到目标图像开始、目标-扫视交叉点和目标上的第一次固定而变化。我们发现，正如预期的那样，作为响应锁定类型的函数，以及波形形状的差异，诱发反应的时间发生了系统性的变化。有趣的是，单次试验分析表明，图像锁定和眼跳锁定分析之间的诱发反应的峰值辨别力没有差异，但它显着降低时锁定。这些结果表明，在VR环境中，视觉信息的感知在时间和视觉空间上存在传播。我们的研究结果表明，考虑如何在自然环境中感知信息的重要性，特别是那些比传统实验室范式更复杂和更高自由度的环境。
Virtual reality (VR) offers the potential to study brain function in complex, ecologically realistic environments. However, the additional degrees of freedom make analysis more challenging, particularly with respect to evoked neural responses. In this paper we designed a target detection task in VR where we varied the visual angle of targets as subjects moved through a three dimensional maze. We investigated how the latency and shape of the classic P300 evoked response varied as a function of locking the electroencephalogram data to the target image onset, the target-saccade intersection, and the first fixation on the target. We found, as expected, a systematic shift in the timing of the evoked responses as a function of the type of response locking, as well as a difference in the shape of the waveforms. Interestingly, single-trial analysis showed that the peak discriminability of the evoked responses does not differ between image locked and saccade locked analysis, though it decreases significantly when fixation locked. These results suggest that there is a spread in the perception of visual information in VR environments across time and visual space. Our results point to the importance of considering how information may be perceived in naturalistic environments, specifically those that have more complexity and higher degrees of freedom than in traditional laboratory paradigms.
影响因子：
4
作者：
Jangraw, David C.;Wang, Jun;Sajda, Paul
通讯作者：
Sajda, Paul