Figure 1.

Plot of median brain stiffness (kPa) versus age in male (blue squares) and female (red circles) populations in the A) cerebrum, B) cerebellum, C) temporal lobes, and D) occipital lobes. Trend lines given by the multiple linear regression model are plotted for males (blue solid line) and females (red solid line). A stiffness versus age-only linear regression line has also been plotted (dashed black line) for comparison purposes.