The influence of local tissue conductivity changes on the magnetoencephalogram and the electroencephalogram

被引：16

作者：

Haueisen, J

Ramon, C

Brauer, H

Nowak, K

机构：

[1] Univ Jena, Biomagnet Zentrum, Neurol Klin, D-07743 Jena, Germany

[2] Univ Washington, Dept Elect Engn, Seattle, WA 98195 USA

[3] Tech Univ Ilmenau, Inst Allgemeine & Theoret Elektrotech, D-98684 Ilmenau, Germany

[4] JENASENSORIC EV, Jena, Germany

来源：

BIOMEDIZINISCHE TECHNIK | 2000年 / 45卷 / 7-8期

关键词：

tissue conductivity; finite element method; FEM; EEG; MEG;

D O I：

10.1515/bmte.2000.45.7-8.211

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

We examined the influence of local tissue conductivity changes in the vicinity of a dipolar source on the neuromagnetic held and the electric scalp potential using a high resolution finite element method model of the human head. We found that the topology of both the electric scalp potential and the neuromagnetic field (and consequently dipole localization) is influenced significantly by conductivity changes only in voxels adjacent to the source. Conductivity changes in these voxels yield a greater change in the amplitude of the magnetic field (and consequently in the dipole strength) than in the amplitude of the electric potential.

引用

页码：211 / 214

页数：4

共 9 条

[1] The electrical conductivity of human cerebrospinal fluid at body temperature [J].