D visualization of the traced limbic tracts of representative subjects at following developing stages, at birth (0 month), early childhood (2 years old), childhood (6 years old), adolescence (13 years old), and young adulthood (22 years old). Cingulate gyrus part of cingulum (cgc), cingulum hippocampal part (cgh), and fornix (fx) were painted with cyan, orange, and pink color, respectively.