Developmental changes in the callosal connections and association tracts. (A) Tract average AWF, ODI, and ICVF values plotted as a function of age (in months) for the posterior callosal connections. (B) Anatomical rendering, with tracts showing significant (p < 0.05, Bonferroni corrected) age related variation in ICVF, ODI, or AWF highlighted in red (positive correlation) or blue (negative correlation). Tracts rendered in less saturated red and blue show moderate age-related variation (p < 0.05, uncorrected). (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article).