Frontal and occipital white matter/visuomotor gray matter. Frontal and occipital white matter/visuomotor gray matter. This white matter cluster included mostly superior–inferior-oriented voxels (74%) in superior cerebellar peduncle (A), occipital and superior parietal (B) and superior frontal gyrus white matter (C, D), posterior thalamic radiation (B, C), and precentral gyrus white matter (D). The corresponding gray matter cluster recruited cuneus (A, B,C), motor (D), superior parietal (B), and lateral prefrontal (C) regions. Mean gray and white matter slopes for the cluster with SDs (E) and a graphical illustration of volume trajectories (F) are shown for all four age bins. Signe Bray et al. eneuro 2015;2:ENEURO.0003-15.2015 ©2015 by Society for Neuroscience