FIGURE 1.

Detection of peaks in the BOLD signal, and the measure of synchronization. (b) Example of the detection of the peaks (red) that exceeded a threshold of 2.2 SD above or below the mean BOLD signal. (The red lines are at 2.2 SD above and below the mean BOLD signal.) The time axis units are in TR units = 0.72 s. (c) Illustration of how the peaks in the BOLD signal can become synchronized. The brain regions are from the automated anatomical labeling 3 atlas (Rolls, Huang, et al., 2020) with the names of the brain areas shown in Table S1. (d,e) The synchronization measure is the proportion of brain regions with a peak within a given volume acquired in one TR. Smoothing is used, and a threshold can be set to define a synchronization event, in this case at 0.1 of the 132 brain regions