The rat amygdaloid nucleus: A morphometric right-left study

Our results indicate that Long-Evans male rats housed in standard conditions show no significant difference between the areas of sections of their left and right amygdalas. In contrast, the S₁ strain maze-bright animals have a significantly greater right amygdala than left. Furthermore, the data indicate an overall increase in mean $\text{(R + L)}\text{2}$ amygdala area from 6 to 400 days, except for a significant decrease in area from 26 to 90 days.