A, Significant intrinsic connectivity of the best model. Significant alterations in effective connectivity of the best model modulated by upright faces (B) and by inverted faces (C). Significant differences between the upright and inverted face conditions: *p < 0.05; **p < 0.01; ***p < 0.005; ****p < 0.05 (Bonferroni corrected). D, Significant connectivity differences between the upright and inverted face conditions. Red arrows indicate positive connections. Blue arrows indicate negative connections.