fact, Supekar and colleagues found developmental increases in functional connectivity in the absence of increased fractional anisotropy, a DTI marker of myelination, although not myelination specifically (Supekar et al. 2010). Moreover, a modest amount of training in adults, which is unlikely to induce myelination or synaptic pruning, can increase functional connectivity between regions (Lewis et al. 2009; Stevens et al. 2010; Tambini et al. 2010).