(Left: male, Right: female): Shape change from 20 (blue) to 100 (red) years of age. Landmark regions with blue landmarks are considered to be regions of relative compression with age (i.e. anterior portion of the FM for both male and female). Landmark regions with red landmarks are considered to be regions of relative expansion with age (i.e. region posterior to FM). L, left; R, right; A, anterior; P, posterior.