Region-of-interest masks for the bilateral NAcc (red) and right VLPFC (green). The arrow represents functional connectivity between the left NAcc and right VLPFC. The scatterplot depicts a negative association between the volume of noise blasts administered after provocation (i.e. retaliatory aggression) and functional connectivity estimates between the left NAcc and right VLPFC (controlling for gender). Curved lines represent 95% C.I. around the partial regression line.