Cylindrical tissue model for magnetic field stimulation of neurons: effects of coil geometry.
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.
Esselle
K P
KP
Department of Electronics, School of Mathematics, Physics, Computing and Electronics, Macquarie University, Sydney, NSW, Australia.
Stuchly
M A
MA
D001132:Arm / Q000294:innervation; D004574:Electromagnetic Fields; D055590:Electromagnetic Phenomena / Q000295:instrumentation* / Q000706:statistics & numerical data; D004867:Equipment Design / Q000706:statistics & numerical data; D006801:Humans; D007866:Leg / Q000294:innervation; D008280:Magnetics; D008433:Mathematics; D008959:Models, Neurological; D009046:Motor Neurons / Q000502:physiology*