Figure 7.

Folding abnormalities of the IPS viewed on average fiducial and individual fiducial surfaces. A, Dorsoposterior view of average control fiducial right surface (n = 13), shaded by the average control sulcal depth. B–D, Dorsoposterior views of individual fiducial surfaces of three control subjects, ordered as described in Figure 6. The significant WS abnormal regions from the population analysis, mapped back to the individual surfaces, are shown using the same red/yellow and green/blue coloring as in Figure 3. E, Dorsoposterior view of the average WS fiducial right-hemisphere surface (n = 16), shaded by the average WS sulcal depth. Note the shallower and more medially positioned IPS (black arrow) compared with the control. F–H, Dorsoposterior views of individual fiducial surfaces of three WS subjects, ordered as described in Figure 6. The medial tip of the central sulcus (red arrows) tends to be deeper in the control than in the WS subjects, consistent with the findings of Galaburda et al. (2001). Data are available at http://sumsdb.wustl.edu/sums/directory.do?dirid=6414209.