Figure 1. MZ cotwin differences in late afternoon cortisol at child age 7.5 yrs and resting-state functional connectivity between the right amygdala and pgPFC at 15.5 yrs.

Intrapair differences in rs-FC between the right amygdala and pgPFC are significantly negatively associated with childhood cortisol (t(12) = 7.94, R² = 0.84, FWE-corrected p = 0.01). Blue hues reflect a heat map of voxelwise connectivity within the surviving cluster, where darker hues of blue reflect reduced connectivity.