Trends in EEG source localization
Trends in EEG source localization
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DOI：
10.1016/s0013-4694(97)00115-6
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发表时间：
1998-02-01
期刊：
影响因子：
--
通讯作者：
Koles, ZJ
中科院分区：
文献类型：
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作者：
Koles, ZJ
沿着与当前和新兴的方法来解决这个问题的定量定位的脑内的EEG源的基本概念进行审查。所提到的概念包括单极和偶极源模型和头部模型，从球形到基于边界和有限元的更现实的模型。讨论了脑电正问题和逆问题，包括逆问题的非唯一性。所描述的反问题的解决方法包括单时间片和多时间片定位，等效偶极子定位和加权最小范数。多个时间片定位的方法被强调可能是最好的，在这个时候，并讨论了EEG的时空模型。噪声腐败，文物和记录电极的数量上的源定位的准确性的影响也被提到。有人建议，最小范数的主要吸引力是，它不假设一个模型的来源，并提供了一个估计的电流密度无处不在的三维体积的头部。(C)1998爱思唯尔科学爱尔兰有限公司
The concepts underlying the quantitative localization of the sources of the EEG inside the brain are reviewed along with the current and emerging approaches to the problem. The concepts mentioned include monopolar and dipolar source models and head models ranging from the spherical to the more realistic based on boundary and finite elements. The forward and inverse problems in electroencephalography are discussed, including the non-uniqueness of the inverse problem. The approaches to the solution of the inverse problem described include single and multiple time-slice localization, equivalent dipole localization and the weighted minimum norm. The multiple time-slice localization approach is highlighted as probably the best available at this time and is discussed in terms of the spatiotemporal model of the EEG. The effect of noise corruption, artifacts and the number of recording electrodes on the accuracy of source localization is also mentioned. It is suggested that the main appeal of the minimum norm is that it does not assume a model for the sources and provides an estimate of the current density everywhere in the three dimensional volume of the head. (C) 1998 Elsevier Science Ireland Ltd.