Fig. 11.

Computational modeling of brain surface morphology. Keeping the thickness of the cortical layer constant, we observe that larger brains tend to be more folded. Indeed, as the radius-to-thickness ratio increases from $r:t_{\mathrm{c}}=10$, top, to $r:t_{\mathrm{c}}=40$, bottom, the brain surface becomes more convoluted as time evolves from $t_1$ to $t_4$