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本文引用的文献

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Multimodal functional neuroimaging: integrating functional MRI and EEG/MEG.多模态功能神经影像学：功能磁共振成像与 EEG/MEG 的整合。
IEEE Rev Biomed Eng. 2008;1(2008):23-40. doi: 10.1109/RBME.2008.2008233. Epub 2008 Nov 5.
2
The effect of tissue anisotropy on the EEG inverse problem.组织各向异性对脑电逆问题的影响。
Annu Int Conf IEEE Eng Med Biol Soc. 2008;2008:4563-6. doi: 10.1109/IEMBS.2008.4650228.
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3-D diffusion tensor MRI anisotropy content-adaptive finite element head model generation for bioelectromagnetic imaging.用于生物电磁成像的三维扩散张量磁共振成像各向异性内容自适应有限元头部模型生成
Annu Int Conf IEEE Eng Med Biol Soc. 2008;2008:4003-6. doi: 10.1109/IEMBS.2008.4650087.
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A new method to derive white matter conductivity from diffusion tensor MRI.一种从扩散张量磁共振成像中推导白质电导率的新方法。
IEEE Trans Biomed Eng. 2008 Oct;55(10):2481-6. doi: 10.1109/TBME.2008.923159.
5
Three-dimensional brain current source reconstruction from intra-cranial ECoG recordings.基于颅内皮层脑电图（ECoG）记录的三维脑电流源重建
Neuroimage. 2008 Aug 15;42(2):683-95. doi: 10.1016/j.neuroimage.2008.04.263. Epub 2008 May 11.
6
Dipole estimation errors due to differences in modeling anisotropic conductivities in realistic head models for EEG source analysis.由于在用于脑电图源分析的真实头部模型中对各向异性电导率进行建模时存在差异而导致的偶极子估计误差。
Phys Med Biol. 2008 Apr 7;53(7):1877-94. doi: 10.1088/0031-9155/53/7/005. Epub 2008 Mar 10.
7
Influence of anisotropic compartments on magnetic field and electric potential distributions generated by artificial current dipoles inside a torso phantom.各向异性隔室对躯干模型内人工电流偶极子产生的磁场和电势分布的影响。
Phys Med Biol. 2008 Jan 7;53(1):245-54. doi: 10.1088/0031-9155/53/1/017. Epub 2007 Dec 19.
8
Methods and evaluations of MRI content-adaptive finite element mesh generation for bioelectromagnetic problems.用于生物电磁问题的MRI内容自适应有限元网格生成的方法与评估
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9
Spatial resolution of EEG cortical source imaging revealed by localization of retinotopic organization in human primary visual cortex.通过人类初级视觉皮层视网膜拓扑组织定位揭示的脑电图皮层源成像的空间分辨率。
J Neurosci Methods. 2007 Mar 30;161(1):142-54. doi: 10.1016/j.jneumeth.2006.10.008. Epub 2006 Nov 13.
10
Influence of anisotropic conductivity on EEG source reconstruction: investigations in a rabbit model.各向异性电导率对脑电图源重建的影响：在兔模型中的研究。
IEEE Trans Biomed Eng. 2006 Sep;53(9):1841-50. doi: 10.1109/TBME.2006.876641.

白质各向异性电导率对脑电图源定位的影响：与人类初级视觉皮层功能磁共振成像的比较。

Influence of white matter anisotropic conductivity on EEG source localization: comparison to fMRI in human primary visual cortex.

作者信息

Lee Won Hee, Liu Zhongming, Mueller Bryon A, Lim Kelvin, He Bin

机构信息

Department of Biomedical Engineering, University of Minnesota, 7-105 BSBE, 312 Church Street, Minneapolis, MN 55455, USA.

Center for Magnetic Resonance Research, Department of Radiology, University of Minnesota, Minneapolis, MN 55455, USA.

出版信息

Clin Neurophysiol. 2009 Dec;120(12):2071-2081. doi: 10.1016/j.clinph.2009.09.007. Epub 2009 Oct 14.

DOI:10.1016/j.clinph.2009.09.007
PMID:19833554
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2790013/
Abstract

OBJECTIVE

The goal of this study was to experimentally investigate the influence of the anisotropy of white matter (WM) conductivity on EEG source localization.

METHODS

Visual evoked potentials (VEP) and fMRI data were recorded from three human subjects presented with identical visual stimuli. A finite element method was used to solve the EEG forward problems based on both anisotropic and isotropic head models, and single-dipole source localization was subsequently performed to localize the source underlying the N75 VEP component.

RESULTS

The averaged distances of the localized N75 dipole locations in V1 between the isotropic and anisotropic head models ranged from 0 to 6.22+/-2.83mm. The distances between the localized dipole positions and the centers of the fMRI V1 activations were slightly smaller when using an anisotropic model (7.49+/-1.35-15.70+/-8.60mm) than when using an isotropic model (7.65+/-1.30-15.31+/-9.18mm).

CONCLUSIONS

Anisotropic models incorporating realistic WM anisotropic conductivity distributions do not substantially improve the accuracy of EEG dipole localization in the primary visual cortex using experimental data obtained using visual stimulation.

SIGNIFICANCE

The present study represents the first attempt using a human experimental approach to assess the effects of WM anisotropy on EEG source analysis.

摘要

目的

本研究的目的是通过实验研究白质（WM）电导率各向异性对脑电图源定位的影响。

方法

记录三名接受相同视觉刺激的人类受试者的视觉诱发电位（VEP）和功能磁共振成像（fMRI）数据。基于各向异性和各向同性头部模型，使用有限元方法解决脑电图正向问题，随后进行单偶极子源定位以定位N75 VEP成分的源。

结果

各向同性和各向异性头部模型中V1区定位的N75偶极子位置的平均距离在0至6.22±2.83mm之间。使用各向异性模型时，定位的偶极子位置与fMRI V1激活中心之间的距离（7.49±1.35 - 15.70±8.60mm）略小于使用各向同性模型时的距离（7.65±1.30 - 15.31±9.18mm）。

结论

结合实际WM各向异性电导率分布的各向异性模型，在使用视觉刺激获得的实验数据时，并未显著提高初级视觉皮层脑电图偶极子定位的准确性。

意义

本研究是首次尝试使用人体实验方法评估WM各向异性对脑电图源分析的影响。