In addition, in less successful learners,
higher diffusivity in a large network comprising frontal, striatal, and
parietal areas correlated negatively with the ability to decrease
functional activation with increasing feedback predictability. With
age, more successful learning was related to higher fractional
anisotropy (FA; a measure of local white-matter density) in the
tracts connecting dorsomedial thalamus and medial prefrontal
cortex (mPFC), and mPFC and nucleus accumbens