Movie S1.

Baseline MT (MT at age 14 y old) for each region, at each fractional depth through cortex, and then, at five 0.2-mm steps into the white matter underlying cortex. MT increases monotonically. This movie corresponds to Fig. 2B and represents data from the discovery cohort. Movies that correspond to the validation and complete cohorts are available in the VALIDATION.zip and COMPLETE.zip compressed directories in the Neuroscience in Psychiatry Network (NSPN) Cortical Myelination Figshare Repository within the PYSURFER_IMAGES/COVARS_ones/PNGS/MOVIES subdirectory for each cohort.