Forward and inverse methods in event related potential imaging using a resistor mesh model

Author

Franceries, X. ; Doyon, B. ; Chauveau, N. ; Rigaud, B. ; Morucci, J.-P. ; Celsis, P.

Author_Institution

Neurology Dept., INSERM, Toulouse, France

Volume

2

fYear

2001

fDate

2001

Firstpage

1030

Abstract

A spherical head model based on a resistor mesh is presented. Each resistor corresponds to the conducting electrical properties of a tissue volume. A current dipole is simulated by an electrical current source connected between two nodes in this mesh. The direct problem is solved and the accuracy of this model is evaluated in comparison with the analytical solution. The results show that the resistor mesh provides correct potential and scalp current density values. The model structure makes it easy to introduce conductivity heterogeneities such as stroke and skull anisotropy. First trials of an inverse method are also presented.

Keywords

bioelectric potentials; brain models; electroencephalography; inverse problems; EEG; ERP; accuracy; analytical solution; conducting electrical properties; conductivity heterogeneities; current dipole; direct problem; electrical current source; electroencephalography; event related potential imaging; forward methods; inverse methods; potential values; resistor mesh model; scalp current density values; skull anisotropy; spherical head model; stroke anisotropy; tissue volume; Anisotropic magnetoresistance; Brain modeling; Conductivity; Current density; Electroencephalography; Head; Inverse problems; Resistors; Scalp; Skull;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE

ISSN

1094-687X

Print_ISBN

0-7803-7211-5

Type

conf

DOI

10.1109/IEMBS.2001.1020364

Filename

1020364