Very high density EEG elucidates spatiotemporal aspects of early visual processing.

Very high density EEG elucidates spatiotemporal aspects of early visual processing.
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DOI:
10.1038/s41598-017-16377-3
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发表时间:
2017-11-24
期刊:
影响因子:
4.6
通讯作者:
Behrmann M
Behrmann M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Robinson AK;Venkatesh P;Boring MJ;Tarr MJ;Grover P;Behrmann M

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基于空间奈奎斯特估计的标准人类脑电系统表明,20-30 mm的电极间距足以捕捉头皮上的神经信号,但最近的研究假设,增加传感器密度可以提供更高分辨率的神经信息。在这里,我们比较了“超奈奎斯特”密度脑电(“SND”)和奈奎斯特密度(“ND”)阵列,以评估早期视觉处理的时空方面。当参与者看到闪烁的棋盘刺激时,用分布在枕颞脑区域(间距14 mm)的128个电极测量脑电。分析将SND与相同电极的ND等效子集进行了比较。无论在时间域还是频域,SND阵列都比ND阵列对频率标记的刺激进行了更准确的分类。代表性相似性分析表明,V1的计算模型与SND的相关性比ND阵列更高。总体而言,SND EEG从视觉皮质捕获了更多的神经信息,主张在基础神经科学和翻译神经科学中加强这一方法的发展。
Standard human EEG systems based on spatial Nyquist estimates suggest that 20–30 mm electrode spacing suffices to capture neural signals on the scalp, but recent studies posit that increasing sensor density can provide higher resolution neural information. Here, we compared “super-Nyquist” density EEG (“SND”) with Nyquist density (“ND”) arrays for assessing the spatiotemporal aspects of early visual processing. EEG was measured from 128 electrodes arranged over occipitotemporal brain regions (14 mm spacing) while participants viewed flickering checkerboard stimuli. Analyses compared SND with ND-equivalent subsets of the same electrodes. Frequency-tagged stimuli were classified more accurately with SND than ND arrays in both the time and the frequency domains. Representational similarity analysis revealed that a computational model of V1 correlated more highly with the SND than the ND array. Overall, SND EEG captured more neural information from visual cortex, arguing for increased development of this approach in basic and translational neuroscience.
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