Numerical model of electrical potential within the human head

Date

2003

Authors

Nixon, J.
Rasser, P.
Teubner, M.
Clark, C.
Bottema, M.

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Journal article

Citation

International Journal for Numerical Methods in Engineering, 2003; 56(15):2353-2366

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J. B. Nixon, P. E. Rasser, M. D. Teubner, C. R. Clark and M. J. Bottema

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Abstract

<jats:title>Abstract</jats:title><jats:p>A realistic subject‐specific human head model was constructed based on structural magnetic resonance imaging (sMRI) data. Electrical conductivities were assigned inhomogeneously according to tissue type and variability within each head segment. A three‐dimensional (3D) finite‐difference method (FDM) was used to compute the evolution of the electrical potential from a single electrical dipole within the brain. The Douglas–Rachford FDM and three versions of iterative FDM were tested on a three‐layer concentric sphere model. The successive over‐relaxation (SOR) iterative method showed the best convergence properties and hence was used to compute the electrical potential within a realistic head model. The effect of using inhomogeneous rather than homogeneous conductivities within head segments of this model was shown to be important. Copyright © 2003 John Wiley &amp; Sons, Ltd.</jats:p>

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The definitive version may be found at www.wiley.com

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Copyright © 2003 John Wiley & Sons, Ltd.

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