Mapping EEG-potentials on the surface of the brain: A strategy for uncovering cortical sources
Mapping EEG-potentials on the surface of the brain: A strategy for uncovering cortical sources
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DOI：
10.1007/bf01190389
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发表时间：
1997-03-01
期刊：
影响因子：
2.7
通讯作者：
Rockstroh, B
中科院分区：
文献类型：
--
作者：
Junghofer, M;Elbert, T;Rockstroh, B
本文提出了一种计算头皮脑电电位分布、电流源密度（CSD）、皮层电位分布（皮层标测）和皮层电位分布CSD的统一方法。它将被证明，插值和去模糊方法，如CSD或皮质映射是不独立的反问题的潜在理论。不仅分辨率而且这些技术的准确度，尤其是去模糊的那些，都很大程度上取决于空间采样率（即，电极的数量）。使用来自模拟和真实的（64通道）数据的示例，可以表明，超过100个EEG通道的应用不仅是有利的，而且是必要的，以保证CSD或皮层映射的计算中的合理准确度。同样，可以表明，使用超过250个电极不会提高分辨率。
This paper describes a uniform method for calculating the interpolation of scalp EEG potential distribution, the current source density (CSD), the cortical potential distribution (cortical mapping) and the CSD of the cortical potential distribution. It will be shown that interpolation and deblurring methods such as CSD or cortical mapping are not independent of the inverse problem in potential theory. Not only the resolution but also the accuracy of these techniques, especially those of deblurring, depend greatly on the spatial sampling rate (i.e., the number of electrodes). Using examples from simulated and real (64 channels) data it can be shown that the application of more than 100 EEG channels is not only favourable but necessary to guarantee a reasonable accuracy in the calculations of CSD or cortical mapping. Likewise, it can be shown that using more than 250 electrodes does not improve the resolution.