Cleaning MEG artifacts using external cues
Cleaning MEG artifacts using external cues
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DOI：
10.1016/j.jneumeth.2013.04.002
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发表时间：
2013-07-15
影响因子：
3
通讯作者：
Abeles, M.
中科院分区：
文献类型：
--
作者：
Tal, I.;Abeles, M.
使用EEG、ECoG、MEG和微电极记录大脑活动容易产生多个伪影。主电源线、视频设备、机械振动和脑外活动是最常见的伪影来源。脑磁图振幅很低，即使是很小的伪影也会扭曲记录。在这项研究中，我们将展示如何通过记录MEG记录过程中的外部线索来有效地去除这些伪影。这些外部线索随后用于记录伪影的精确时间或频谱。结果表明，这些程序保留了神经磁信号的频谱和时域波形，同时成功地减少了伪影对目标信号的贡献，而不降低数据的秩。(C)2013爱思唯尔有限公司版权所有。
Using EEG, ECoG, MEG, and microelectrodes to record brain activity is prone to multiple artifacts. The main power line (mains line), video equipment, mechanical vibrations and activities outside the brain are the most common sources of artifacts. MEG amplitudes are low, and even small artifacts distort recordings. In this study, we show how these artifacts can be efficiently removed by recording external cues during MEG recordings. These external cues are subsequently used to register the precise times or spectra of the artifacts. The results indicate that these procedures preserve both the spectra and the time domain wave-shapes of the neuromagnetic signal, while successfully reducing the contribution of the artifacts to the target signals without reducing the rank of the data. (C) 2013 Elsevier B.V. All rights reserved.