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Every day sees a new research article on addiction,
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, be it cocaine,
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, heroin,
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, food or porn. Each one takes a specific angle on how addiction works in the brain. Perhaps it’s a disorder of reward, with drugs hijacking a natural system that is meant to respond to food,
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, sex and friendship. Possibly addiction is a disorder of learning,
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, where our brains learn bad habits and responses. Maybe we should think of addiction as a combination of an environmental stimulus and vulnerable genes.? Or perhaps it’s an inappropriate response to stress, where bad days trigger a relapse to the cigarette, syringe or bottle.
None of these views are wrong. But none of them are complete, either. Addiction is a disorder of reward, a disorder of learning. It has genetic,
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, epigenetic and environmental influences. It is all of that and more. Addiction is a display of the brain’s astounding ability to change — a feature called plasticity ?— and it showcases what we know and don’t yet know about how brains adapt to all that we throw at them.?
“A lot of people think addiction is what happens when someone finds a drug to be

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