Graph-theoretical analysis of the global correlation structure of band-limited neuronal signals. (**a**) Spectrally resolved degree. The dashed line indicates the significance threshold (1.01%; P = 0.05, corrected for the number of nodes). (**b**) Degree at a carrier frequency of 16 Hz resolved in cortical space (LPC, lateral parietal cortex). The color scale is adjusted to the maximal and minimal degree occurring. (**c**) Spectrally resolved number of nodes with significantly increased betweenness compared to the average betweenness value (voxel-wise permutation test for betweenness > average betweenness, corrected for the number of nodes, P < 0.05). (**d**) Betweenness at a carrier frequency of 16 Hz resolved in cortical space. Betweenness is statistically masked at two levels (permutation test, corrected for the number of nodes, P < 0.05, saturated color scale; permutation test, P < 0.05, uncorrected, desaturated color scale). The color scale is adjusted to the maximal and minimal betweenness within the statistical mask. (**e**) Spectrally resolved number of normalized betweenness nodes defined analogously to **c**. (**f**) Normalized betweenness at a carrier frequency of 16 Hz resolved in cortical space defined analogously to **d** (MPFC, medial prefrontal cortex; TMPC, temporal cortex; DPFC, dorsal prefrontal cortex).

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