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Overview of the group-wise parcellation method. Each subject Si is associated with a connectivity matrix χSi that drives the construction of a multi-scale base parcellation. Intra-subject edges (between base parcellation resolutions) and inter-subject edges (between all pairs of subjects at the coarsest parcellation resolution) are built to allow a common spectral decomposition of the affinity matrix (Pearson’s correlation between the tractography connectivity profiles).
