We examined differences in median tract length with age across eighteen major white matter tracts in 541 subjects of the Human Connectome Project in Aging. We observed a significant negative age effect on tract length in the forceps minor, left cingulum angular bundle, right superior longitudinal fasciculus parietal, and right uncinate fasciculus. Paradoxically, we also report a significant positive age effect on tract length in the forceps major and right cingulate gyrus. Restricted analyses suggest that these effects are driven by female subjects.
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