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Three different weighting strategies for an exemplar ROI. (a) Precentral gyrus ROI (green). (b) Unweighted: dipoles are given equal weight when classifying. (c) Centroid weighting: dipoles are weighted by the cortical surface distance to the ROI’s center. (d) Gaussian mixture: dipoles are weighted according to a spatial convolution of a Gaussian kernel with their importance to generate a non-uniform weighting profile (see text for details).
