Figure 2. Gray-matter differences on the lateral brain surfaces. The mean reduction in gray matter in the MA group, relative to healthy controls, is expressed as a percentage and shown color-coded (blue colors, no reduction; red colors, greater reduction). In the left medial wall (a) and right-lateral (b) and left-lateral (c) brain surfaces, gray-matter differences are not pronounced. The significance of these differences is plotted in d-f. Differences were not significant after correction for multiple comparisons.