VENTRAL STRIATUM
WHAT IT DOES: Helps the brain process rewards
WHAT HAS GONE WRONG: Studies show overactivity and a 30% loss in gray matter in this region, causing people to lose judgment about how certain behaviors, such as overspending or being sexually indiscriminate, will affect their lives
PREFRONTAL CORTEX
WHAT IT DOES: Parts of the prefrontal cortex regulate emotion and are instrumental in processing rewards and motivation
WHAT HAS GONE WRONG: Studies show a 20% to 40% reduction in gray matter-the result of a loss of the branches that connect neurons
AMYGDALA
WHAT IT DOES: One of the brain's emotional centers;...
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