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Happiness and the Evolution of Brain Size

This shows a brain growing like a treeStudy reveals a new role for serotonin in the development of the human neocortex. Serotonin acts cell-extrinsically as a growth factor for basal progenitors in the developing neocortex. Researchers report placenta-driven serotonin likely contributed to the evolutionary expansion of the neocortex in humans.

from Neuroscience News https://ift.tt/2Hwoctz
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