Correlations between age of onset of deafness (AOD) in acquired deaf individuals and the mean fractional anisotropy (FA) in regions showing group FA differences. (a) Later AOD is correlated with higher FA values in right superior temporal gyrus (STG) (r = 0.286, P = 0.045). (b) Later AOD is correlated (not significantly) with higher FA values in left Heschl's gyrus (HG) (r = 0.233, P = 0.086). (c) Later, AOD is correlated with higher FA values in splenium of corpus callosum (SCC) (r = 0.306, P = 0.035). The correlations for right STG and left HG were still significant after partialing for duration of deafness (right STG: r = 0.318, P = 0.032; left HG: r = 0.324, P = 0.029).