Parcellation and RSFC estimates
We extracted vmPFC, dmPFC, amPFC, and amygdala time series using a set of non-overlapping, bilateral parcels (For statistical analyses, we computed (static) RSFC estimates per segment (baseline; first, middle, and last 10 min of infusion). Specifically, we calculated Spearman correlations between vmPFC-amygdala, dmPFC-amygdala, and amPFC-amygdala time series for all segments of interest and standardized them using a Fisher z-transformation.For descriptive purposes, we also computed and plotted timepoint-by-timepoint (i.e., dynamic) RSFC estimates using a computational approach developed by Owen et al. (