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Zusammenfassung:
The biophysics of transcranial magnetic stimulation (TMS) is not yet well understood. We characterize in detail the electric field induced in gray (GM) and white matter (WM), using a geometrically accurate model of an individual head combined with high-resolution diffusion weighted imaging (DWI). Use of finite element methods (FEM) allows determination of the impact of gyrus orientation and WM anisotropy on the field induced by a figure-8 coil.