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. 2016 Jul 25;113(32):9105–9110. doi: 10.1073/pnas.1601745113

Fig. 1.

Fig. 1.

Cortical thickness (CT) and magnetization transfer (MT) maps. At 14 y old, primary somatosensory and visual cortices had (A) thinner cortex and (C) greater MT than association cortical areas. (F) Baseline CT (millimeters) and MT (PU) were negatively correlated, confirming that thinner cortex was more myelinated at 14 y old. Globally, over all 308 regions, (B) CT decreased linearly with increasing age in the range 14–24 y old, although (E) there were regional differences in the rate of cortical shrinkage (ΔCT), with significantly nonzero rates of shrinkage (permutation test; FDR = 0.05) located mainly in the association cortex. (D) Globally, MT increased linearly with increasing age in the range 14–24 y old, although (G) there were regional differences in the rate of cortical myelination (ΔMT), with significantly nonzero rates of myelination (permutation test; FDR = 0.05) located mainly in the association cortex. (H) Rates of change in thickness and MT were negatively correlated, confirming that more rapidly shrinking areas of cortex had faster rates of myelination.