Myelination of our brains. In super simplified terms, it is over clocking our brains part by part. It continues until mid to late 20s. >After infancy, the ra

Myelination of our brains. In super simplified terms, it is over clocking our brains part by part. It continues until mid to late 20s. >After infancy, the rate of myelination slowed during childhood and adolescence, but exhibited continued growth until the end of the third decade. Specifically, mean MFLD during later adulthood (defined as ≥28 y) was significantly greater than in adolescence and early adulthood (11–23 y; Welch t, P = 0.000059; Mann–Whitney U, P = 0.00016). https://www.pnas.org/content/109/41/16480 https://www.pnas.org/content/109/41/16480 Our (dorsolateral) prefrontal cortex is one of the last parts to myelinate. >The last areas to myelinate are the anterior cingulate cortex (F#43), the inferior temporal cortex (F#44) and the dorsolateral prefrontal cortex (F#45). https://en.wikipedia.org/wiki/Myelinogenesis https://en.wikipedia.org/wiki/Myelinogenesis This is the area of the brain that handles things like planning and abstract reasoning (though it isn't the only area involved in such thinking).