Astroglial cell immunostaining. Counts of activated GFAP-positive staining in the corpus callosum (A), cortex (B), deep gray matter (C), and hippocampus (D), at 24-h postnatal age. Values are means ± SEM; n = 6/group. Statistical analysis, 2-way ANOVA. Significance, P ≤ 0.05. Line represents significant differences determined with post hoc analysis