Measurement of saccadic eye movements by electrooculography for simultaneous EEG recording
Measurement of saccadic eye movements by electrooculography for simultaneous EEG recording
复制标题
同时记录脑电图的眼电眼动测量
DOI：
10.3758/s13428-019-01280-8
复制
发表时间：
2019-10-01
影响因子：
5.4
通讯作者：
Tyler, Christopher W.
中科院分区：
文献类型：
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作者：
Jia, Yingxin;Tyler, Christopher W.
眼动是视觉信息处理、决策、视觉运动协调、运动表现等神经功能的重要指标。然而，现有的光学跟踪方法在许多情况下是不切实际的，例如戴眼镜或存在眼科疾病，这可以通过眼电图（EOG）准确记录眼球运动来克服。在这项研究中，我们使用128通道EGI电极网以500 hz的采样率记录眼球运动，同时使用高密度脑电图（EEG）记录眼球运动，包括适当的面部电极。参与者在一个由5x5的刺激目标网格组成的校准目标上进行眼球运动。结果表明，EOG方法可以准确分析固定位置的振幅和方向以及跳眼动态，在有提示和无提示的分析机制下，时间分辨率均为500 Hz。眨眼反应可以单独识别，并且显示出比以前认识到的更复杂的来源来源。结果还表明，通过EEG网络记录的EOG信号可以达到与典型的光学眼动追踪设备一样精确的结果，并且还可以同时评估所有类型眼动期间的神经活动。此外，该方法有效地解决了眼动仪定位和眼动同步的技术难题。我们发现，同时记录EOG/EEG是一种方便的测量眼球运动的方法，其准确性可与许多专门的眼球追踪系统相媲美。
Eye movements are an important index of the neural functions of visual information processing, decision making, visuomotor coordination, sports performance, and so forth. However, the available optical tracking methods are impractical in many situations, such as the wearing of eyeglasses or the presence of ophthalmic disorders, and this can be overcome by accurate recording of eye movements by electrooculography (EOG). In this study we recorded eye movements by EOG simultaneously with high-density electroencephalogram (EEG) recording using a 128-channel EGI electrode net at a 500-Hz sampling rate, including appropriate facial electrodes. The participants made eye movements over a calibration target consisting of a 5x5 grid of stimulus targets. The results showed that the EOG methodology allowed accurate analysis of the amplitude and direction of the fixation locations and saccadic dynamics with a temporal resolution of 500 Hz, under both cued and uncued analysis regimes. Blink responses could be identified separately and were shown to have a more complex source derivation than has previously been recognized. The results also showed that the EOG signals recorded through the EEG net can achieve results as accurate as typical optical eye-tracking devices, and also allow for simultaneous assessment of neural activity during all types of eye movements. Moreover, the EOG method effectively avoids the technical difficulties related to eye-tracker positioning and the synchronization between EEG and eye movements. We showed that simultaneous EOG/EEG recording is a convenient means of measuring eye movements, with an accuracy comparable to that of many specialized eye-tracking systems.