Cortical thickness follows mostly a monotonic linear decline after 5 years of age.
Areas with cubic developmental trajectories have peaks of cortical thickness prior to age 8.
The only sex difference in maturation is faster occipital thinning in males.
Mean cortical thickness follows a monotonic linear decline of 0.027 mm per year.
Quality control processes have a significant impact on identified trajectories.
A post-processing quality control should be applied in all cortical thickness studies.