Fig. 2.

Regional effects of group (blue) and trajectory differences between groups (green and purple) across the cortical mantle. Effects are displayed for the left and right hemispheres in cortical volume (top row) cortical surface area (middle row) and average cortical thickness (bottom row). Regions that showed smaller values in ASD compared to controls across the entire age range are indicated in blue. Area's that showed group ∗ age interaction effects are displayed in green and purple. Most of these regions showed linear age effects with smaller declines in the ASD group compared to typically developing peers. Exceptions are the volumes of the left superior parietal gyrus and right lingual gyrus as well as the thickness of the left superior frontal gyrus that all showed cubic, rather than linear age effects.