Figure 6. Time-varying subsystem connectivity within and between attentional systems and SM. (A) Connection densities of significant interareal gamma-band (40–60) Hz and delta/theta-band (3–7 Hz) synchronization among Yeo-atlas brain systems for Hits and Misses compared with baseline and for their difference. Only such system-system connections are shown that exhibit greater connection densities than expected by chance in shuffled graphs (p < 0.05, permutation statistics, see Methods). The color, line width, and radius of circles of the system-system connections indicates the connection density of significant couplings (K_systems) within (circles) or between (lines) the functional systems in a time window of 225–375 ms. (B) Time-resolved cumulative connection densities (K) of gamma- and delta/theta-band synchronization estimated separately for within-attentional (DAN, FNP, and VAN), between SM and attentional, and all other functional subsystems. Synchronization in task-positive sensory and attentional systems predicted subsequent conscious perception in gamma band, whereas synchronization in the delta/theta band was observed in SM along with connections to and within-attentional systems throughout the time course of stimulus detection.