Figure 4:

Local Gyrification Comparisons: Lateral and medial views of maps of the difference in local gyrification between the two species are shown in the first column accompanied by a vertical scale such that yellow to red colours indicate that the cortex is relatively more gyrified in humans than chimpanzees (scaled values > 0) and light to dark blue colours (scaled values < 0) indicate that the cortex is relatively more gyrified in chimpanzees than humans. The second column shows those regions of the Desian-Killany atlas (same colour coding and labelling as in Figure 3) where human are significantly more gyrified and the third column shows regions where chimpanzees have comparatively greater gyrification.