The matrices of differences in effective connectivity between schizophrenia patients and controls. The axes are the AAL2 areas, shown in their numbered order and with their names in Supplementary Table S1. The effective connectivity matrix has the index j for the columns and the index i for the rows. The matrix is thus non-symmetric, and the effective connectivity is always from j to i. The effective connectivity between any pair of links is shown in one direction in the upper right of the matrix, and in the opposite direction in the lower left.