Group differences on diffusion parameters and volumes at 7 years
Mean differences between the VPT and term-born children in
diffusion parameters and volumes for each tract are presented in
Fig. 6. For diffusion values, axial, radial, and mean diffusivity of the reticular
activating systemand radial diffusivity of the corpus callosumwere
significantly greater in the VPT children compared with the term controls.
Fractional anisotropy values of the corpus callosum were significantly
reduced in the VPT group compared with the term group.
Significant volumereductionswere also found in the reticular activating
system of the VPT children compared with the term children. No clear
group differences were observed for the other tracts.