A quantitative physical model of the TMS-induced discharge artifacts in EEG
Fig 2
The initial voltage distribution in the skin capacitor after the pulse as described by the model.
(A) The initial voltage distribution (shaded red) underneath a recording electrode located at x1 modelled as a box function B with radius b (dashed) convolved with a Gaussian with variance σ1. Darker color means higher density, white means 0. More intense color corresponds to larger voltage amplitude. (B) The initial voltage distribution can have a displacement μ1 w.r.t. its center x1. The reference electrode (shaded blue) also has parameters σ2 and μ2. (C) Some initial voltage distributions can be selected such that their linear combination (green) may approximate the initial voltage distributions at all remaining electrodes.