Comparison of the MSA and W groups revealed 87 probe sets (representing 84 individual named genes) were significantly different at p < 0.01. However, because this number is less than 1% of the identifiable genes on the Affymetrix GeneChip® (Rat Genome 230 2.0 array GeneChips) and the overall estimated FDR rate was greater than 0.90, these differences could have occurred by chance alone (data not shown). Of the 84 named genes, there were 35 differences in common with differences observed between the CA vs. W groups, some of which included Arc, Cav2, Fos, Jun, Junb, Nos3, Pik3c3, and Plce1 (indicated in bold type in Table 1).