T2 values in each group for different brain regions: Corpus callosum and associated subcortical white matter (a), CA1 (b), CA 3 (c), and thalamus (d) in ipsilateral and contralateral hemispheres. S=sham, SO=sham + OPN, T=TBI, TO=TBI + OPN.
Statistics: *=P<0.05; T2 values ipsilateral CC and associated subcortical WM: Kruskal-Wallis test χ2 (3)=10.25, n=5 per group, *P=0.0166; T2 values contralateral CC and associated subcortical WM: Kruskal-Wallis test χ2 (3)=6.634, n=5 per group, P=0.0845; T2 values ipsilateral CA1: Kruskal-Wallis test χ2 (3)=11.89, n=5 per group, **P=0.0078; T2 values contralateral CA1: Kruskal-Wallis test χ2 (3)=8.12, n=5 per group, *P=0.0436; T2 values ipsilateral CA3: Kruskal-Wallis test χ2 (3)=2.68, n=5 per group, P=0.4436; T2 values contralateral CA3: Kruskal-Wallis test χ2 (3)=1.994, n=5 per group, P=0.5736; T2 values ipsilateral thalamus: Kruskal-Wallis test χ2 (3)=7.777, n=5 per group, P=0.0508; T2 values contralateral thalamus: Kruskal-Wallis test χ2 (3)=8.486, n=5 per group, P=0.037.