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Understanding Addiction: How Addiction Hijacks the Brain

http://www.helpguide.org/harvard/how-addiction-hijacks-the-brain.htm
key insights
Addiction involves craving for something intensely, loss of control over its use, and continuing involvement with it despite adverse consequences.
Addiction changes the brain, first by subverting the way it registers pleasure and then by corrupting other normal drives such as learning and motivation.
Although breaking an addiction is tough, it can be done.

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