Identifying auditory attention with ear-EEG: cEEGrid versus high-density cap-EEG comparison
Identifying auditory attention with ear-EEG: cEEGrid versus high-density cap-EEG comparison
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DOI：
10.1088/1741-2560/13/6/066004
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发表时间：
2016-12-01
影响因子：
4
通讯作者：
Debener, Stefan
中科院分区：
文献类型：
--
作者：
Bleichner, Martin G.;Mirkovic, Bojana;Debener, Stefan
Objective.这项研究提出了一个直接比较的经典EEG帽设置与一个新的耳朵周围的电极阵列（cEEGrid），以获得更好地了解潜在的耳为中心的EEG。Approach.同步脑电图记录从一个经典的头皮脑电图帽和两个cEEGrids被放置在左右耳。20名参与者进行了空间听觉注意任务，其中三个声音流同时呈现。这些声音流有3秒钟长，并且在起源方向（前、左、右）和节拍数（分别为3、4、5）以及音色和音高上有所不同。参与者必须注意左边或右边的声音流。主要结果。我们发现了明确的注意调制ERP的影响，反映了出席的声音流的两个电极设置，同意在形态和效果大小。单次试验模板匹配分类表明，注意力的方向可以解码显着高于机会（50%），至少有16个20名参与者的两个系统。单次试验分析的极高分类结果强调了cEEGrids记录的信号质量。意义这些发现进一步证明了耳旁EEG记录的可行性，并证明了可以测量描述良好的ERP。我们的结论是隐藏的耳后EEG记录可以替代经典的帽EEG采集听觉注意监测。
Objective. This study presents a direct comparison of a classical EEG cap setup with a new around-the-ear electrode array (cEEGrid) to gain a better understanding of the potential of ear-centered EEG. Approach. Concurrent EEG was recorded from a classical scalp EEG cap and two cEEGrids that were placed around the left and the right ear. Twenty participants performed a spatial auditory attention task in which three sound streams were presented simultaneously. The sound streams were three seconds long and differed in the direction of origin (front, left, right) and the number of beats (3, 4, 5 respectively), as well as the timbre and pitch. The participants had to attend to either the left or the right sound stream. Main results. We found clear attention modulated ERP effects reflecting the attended sound stream for both electrode setups, which agreed in morphology and effect size. A single-trial template matching classification showed that the direction of attention could be decoded significantly above chance (50%) for at least 16 out of 20 participants for both systems. The comparably high classification results of the single trial analysis underline the quality of the signal recorded with the cEEGrids. Significance. These findings are further evidence for the feasibility of around the-ear EEG recordings and demonstrate that well described ERPs can be measured. We conclude that concealed behind-the-ear EEG recordings can be an alternative to classical cap EEG acquisition for auditory attention monitoring.