Cylindrical tissue model for magnetic field stimulation of neurons: effects of coil geometry

Author

Esselle, Karu P. ; Stuchly, Maria A.

Author_Institution

Dept. of Electron., Macquarie Univ., North Ryde, NSW, Australia

Volume

42

Issue

9

fYear

1995

Firstpage

934

Lastpage

941

Abstract

An analytical solution for the electric field induced in a homogeneous cylindrical conductor under quasi-static conditions from current in a coil is used to model peripheral nerve stimulation with magnetic fields. A variety of coil geometries is analyzed in terms of the spatial derivative of the induced electric field along a long straight nerve, parallel to the axis, in a human-arm model. The results of these computations are found to be in general agreement with conclusions regarding the optimization of stimulating coils derived from analyses of the semi-infinite tissue model. The differences and their physical basis are pointed out.

Keywords

biological effects of fields; biomagnetism; cellular effects of radiation; magnetic field effects; neurophysiology; physiological models; coil geometry effects; cylindrical tissue model; homogeneous cylindrical conductor; human-arm model; induced electric field; long straight nerve; magnetic field stimulation; neurons; quasistatic conditions; semiinfinite tissue model; spatial derivative; stimulating coils optimization; Coils; Engine cylinders; Geometry; Humans; Magnetic analysis; Magnetic fields; Neurons; Physics computing; Shape; Solid modeling; Arm; Electromagnetic Fields; Electromagnetics; Equipment Design; Humans; Leg; Magnetics; Mathematics; Models, Neurological; Motor Neurons;

fLanguage

English

Journal_Title

Biomedical Engineering, IEEE Transactions on

Publisher

ieee

ISSN

0018-9294

Type

jour

DOI

10.1109/10.412660

Filename

412660