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The Modern Hijacking of Dopamine: Supernormal vs. Ancestral Stimuli

Scientists recently discovered  a major difference between humans and apes. It’s not the body hair, or the prehensile feet, or the propensity to fling poop with less-than-perfect accuracy. It’s actually the TH gene, one that directs the production of the neurotransmitter dopamine. Humans express the TH gene in the striatum, a part of the brain involved in movement, and in the neocortex, which conducts higher-order thinking.
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