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. Author manuscript; available in PMC: 2010 Dec 1.
Published in final edited form as: J Comput Neurosci. 2010 Jan 9;29(3):371–387. doi: 10.1007/s10827-009-0205-z

Fig. 6. Alignment of current flow with white matter fiber direction under different models.

Fig. 6

(a) Coronal section containing electrode LC shows fractional anisotropy (FA) in the white matter. Superior region of corona radiata is marked by the rectangular box and labeled as ‘S.C.R’. (b) Alignment of the current vectors with the white matter fibers is visualized by calculating the cosine of the angle between the primary eigenvector of the conductivity tensor and the electric current density vector calculated due to dipole at LC12 in the anisotropic model, ANISO_IC. (c) Same, using the 15 tissue isotropic model, ISO_III. (d) Same, using the 3 tissue model, ISO_I. Cosine values closer to 1 indicate a higher degree of alignment