In the Child Psychiatry Branch cohort, developmental curves of total cerebellum size were similar to that of the cerebrum following an inverted U shaped developmental trajectory with peak size occurring at 11.3 in girls and 15.6 in boys. In contrast to the evolutionarily more recent cerebellar hemispheric lobes that followed the inverted U shaped developmental trajectory, cerebellar vermis size did not change across this age span (Tiemeier et al., 2010).
