Title :
Simulation of the influence of tissue inhomogeneity on nerve excitation elicited by magnetic stimulation
Author :
Liu, R. ; Ueno, S.
Author_Institution :
Dept. of Biomed. Eng., Tokyo Univ., Japan
fDate :
29 Oct-1 Nov 1998
Abstract :
The influence of tissue inhomogeneity on nerve excitation elicited by magnetic stimulation is investigated. The spatial distributions of gradient of induced electric fields, i.e., activating function, for nerve excitation elicited by magnetic stimulation are calculated in homogeneous and inhomogeneous volume conductor models. The computer simulation shows that the interface between conductors of different conductivities appears to affect markedly the nerve excitation elicited by magnetic stimulation. Our simulation study explains well the phenomenon that the median nerve bundle in the elbow is easily stimulated by magnetic stimulation even when the induced electric currents flow in the direction perpendicular to the nerve bundle
Keywords :
biomagnetism; neurophysiology; physiological models; Laplace equation; activating function; computer simulation; elbow; figure-eight coil; gradient of induced electric fields; homogeneous volume conductor model; inhomogeneous volume conductor models; interface between conductors; magnetic stimulation; median nerve bundle; nerve excitation; spatial distributions; tissue inhomogeneity; virtual cathode; Cathodes; Coils; Conductivity; Conductors; Current; Elbow; Magnetic stimulation; Medical simulation; Nerve fibers; Nonuniform electric fields;
Conference_Titel :
Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE
Conference_Location :
Hong Kong
Print_ISBN :
0-7803-5164-9
DOI :
10.1109/IEMBS.1998.746121
