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Comparison of homogeneous and heterogeneous tissue models for coil optimization in neural stimulation
Author(s) -
D'Inzeo G.,
Esselle K. P.,
Pisa S.,
Stuchly M. A.
Publication year - 1995
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/94rs01917
Subject(s) - electromagnetic coil , homogeneous , physics , stimulation , magnetic field , function (biology) , conductor , mechanics , mathematical analysis , nuclear magnetic resonance , mathematics , geometry , neuroscience , statistical physics , quantum mechanics , evolutionary biology , biology
In stimulation of peripheral nerves by strong pulsed magnetic fields, it is desirable to produce a well‐focused activating function. Previous analyses and an experiment have indicated that quadruple coils provide many advantages. An analytical solution has been obtained for a homogeneous cylindrical volume conductor, and a finite difference numerical solution for a realistic heterogeneous model of a human forearm. In both models it has been assumed that nerves are straight and long, and therefore the activating function is an induced field derivative in the neuron direction. The magnitudes of the activating function for various coil geometries are compared for the two models.