Figure 4.

Results of the voxel‐based morphometry analysis. Hallucinators were significantly more likely to suffer from decreased gray matter density in the right anterior insula (peak voxel: 38, 2, −2) and left anterior insula (−32, 16, −8). This suggests that patients with visual misperceptions are unable to use their anterior insula in order to actively recruit activation in the dorsal attention network in the presence of an ambiguous stimulus. Color intensity on the graph represents the t‐statistic at each voxel after correction for multiple comparisons (FDR P < 0.05). [Color figure can be viewed in the online issue, which is available at http://wileyonlinelibrary.com.]