(A) The mRNA levels of the NMDA subunit, Nr1, were not significantly changed in irradiated mice compared to sham mice. (B) However, the mRNA levels in the NMDA subunit, Nr2A, were significantly upregulated, (C) and the mRNA levels in NMDA subunit, Nr2B, were significantly decreased in irradiated mice compared to sham. Data are presented as fold change in gene expression relative to 0 Gy controls. Average ± SEM (n=10); *p < 0.05; ***p < 0.001