Fig. 3.

The effects of ⁵⁶Fe-particle radiation on total numbers of activated microglia in the dentate gyrus of mice. Cell numbers/unit area (mm²) were determined from four representative coronal sections of the dentate gyrus at the level of the dorsal hippocampus. While there tended to be more activated microglia in all the irradiated groups, none of the changes were significant. Each bar represents the mean for five or six mice, and error bars are standard errors of the means.