Figure 4

Significant differences in the directional information flow (GC) between cortical hubs related the post-/pre- periods and NS/SC comparisons are presented for delta in panel A, and for theta in panel B. Comparisons related to the NS are presented in the first column, those related to the SC are presented in the second column. Significant differences in the normalized directional information flow related to the post-NS versus post-SC comparison are presented in the third column. A colored arrow between hubs i and j denotes a significant increase of the information flow (nomalized information flow) in the i → j direction. Let i and j be two cortical hubs: the normalized information flow in the i → j direction was obtained for each session by dividing the post-period value by its corresponding pre-period value. Black, orange and red arrows respectively refer to significant increases at p < 0.05, p < 0.01 and p < 0.001.