Figure 13

Linear regressions relating one measure of neurogenesis in HVC (the density of BrdU⁺-DCX⁺ fusiform neurons) to the behavioral and physiological variables that were significantly affected by the irradiation. Irradiated birds are represented by black data points and controls by open data points. The full lines represent the regressions based on all birds (correlation coefficient and associated one tailed probabilities in large font) while the dotted regression lines and correlations and probabilities in smaller font and in parentheses refer to the analyses of irradiated birds only.