Comparison of rat, ferret and Macaque nemestrina brains at term
equivalence, demonstrating the presence of gyri in ferrets and nonhuman
primates, as well as an increase in white to gray matter ratios in ferrets and
primates compared to rodent brain. The horizontal line below each brain shows a
1 cm marker for scale. GM denotes gray matter, WM denotes white matter, and hip
indicates the location of the hippocampus in each coronal brain section.