White matter pathways were automatically identified using an open-source, freely available software package, Automated Fiber Quantification (AFQ) version 1.2 (
https://github.com/yeatmanlab/AFQ). AFQ
\cite{Yeatman_2012} identifies the core of 20 major fiber tracts and also segments the corpus callosum into eight subsections. The 20 major pathways are the corticospinal tract, inferior longitudinal fasciculus, inferior fronto-occipital fasciculus, uncinate fasciculus, anterior thalamic radiation, cingulum cingulate gyrus and hippocampal bundles, superior longitudinal fasciculus, arcuate fasciculus, and forceps major and forceps minor of the corpus callosum. The eight subsections of the corpus callosum are roughly associated with the orbitofrontal, the anterior frontal, superior frontal, motor, superior parietal, posterior parietal, occipital, and the temporal regions.