Timeline of human brain development

The human brain development timeline encompasses the sequential, overlapping phases in which the central nervous system forms, matures, and reorganizes from conception through adolescence and into early adulthood. This process starts in the third gestational week with the differentiation of neural progenitor cells and progresses through neurogenesis, cell migration, synaptogenesis, myelination, and synaptic pruning.

Source: Wikipedia — Timeline of human brain development (CC BY-SA 4.0)