FA-Fractional anisotropy- is a measure often used in diffusion imaging where it is thought to reflect fiber density, axonal diameter, and myelination in white matter Excerpts from study findings… Compared with controls, both persistent and recovered groups exhibited FA reductions in the left arcuate fasciculus in the inferior parietal lobule (i.e., a part of the superior longitudinal fasciculus) as well as in the posterior temporal lobe. Another set of FA reductions for both stuttering groups relative to controls was found in the corpus callosum, which contains tracts that interconnect the bilateral motor cortical regions. Compared with controls, the persistent group showed a reduction in the mid‐section of the corpus callosum body and splenium whereas recovered children showed FA reductions in the superior part of the corpus callosum body, near the supplementary motor area. In addition to these FA reductions, increased FA was observed in the superior part of the corpus callosum body for the persistent group tl; dr white matter density deviations observed in both recovered and persistent stutterers compared to controls. As well as differences in white matter density in recovered to persistent stuttering.