Figure 4.

(a) Brain regions showing age‐related decreased GMV and activation in SS > GS; (b) mediation analysis showed that GMV reduction in the medial prefrontal cortex (MPFC) is a complete mediator of age‐related decrease in activation during inhibitory control; (c) linear regression of BOLD contrast against age for the right IFGpo/AI, MPFC and MOG to highlight the contrasting patterns of age‐related change; and (d) mediation analyses showing that the activities both of the right IFGpo/AI and MPFC partially mediated age‐related increases in activation of the MOG [Color figure can be viewed at http://wileyonlinelibrary.com]