Determination of spatial distribution of induced electric fields and the gradients in inhomogeneous volume conductors exposed to time-varying magnetic fields

Author

Ueno, Shoogo ; Liu, Ren

Author_Institution

Dept. of Biomed. Eng., Tokyo Univ., Japan

Volume

6

fYear

1997

fDate

30 Oct-2 Nov 1997

Firstpage

2468

Abstract

A mathematic model is proposed to study the effect of the inhomogeneities in the body on the behavior of nerve excitation elicited by magnetic stimulation. A finite element method is introduced for the numerical calculation. The boundary condition at the interface between two media with different conductivities constrains the behavior of induced electric fields and currents. A computer simulation shows that the site of nerve excitation is strongly affected by the interface of the two media. The proposed model is useful for the design and analysis in magnetic stimulation of the brain and peripheral nerve system as well as the study of biological effects of extremely low frequency and radio frequency electromagnetic fields

Keywords

bioelectric phenomena; biological effects of fields; brain models; digital simulation; finite element analysis; magnetic field effects; neurophysiology; physiological models; body inhomogeneities; extremely low frequency fields; induced electric fields spatial distribution determination; magnetic brain stimulation; mathematic model; media interface; peripheral nerve system; radio frequency electromagnetic fields; time-varying magnetic fields; Biological system modeling; Boundary conditions; Brain modeling; Computer simulation; Conductivity; Finite element methods; Magnetic stimulation; Mathematical model; Mathematics; Nonuniform electric fields;

fLanguage

English

Publisher

ieee

Conference_Titel

Engineering in Medicine and Biology Society, 1997. Proceedings of the 19th Annual International Conference of the IEEE

Conference_Location

Chicago, IL

ISSN

1094-687X

Print_ISBN

0-7803-4262-3

Type

conf

DOI

10.1109/IEMBS.1997.756825

Filename

756825