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Psychological dependence

In the science of addiction, psychological dependence refers to the psychological factors, including mood and motivation that help to sustain addictive behaviors (like craving a cigarette after a meal), as opposed to the physical dependence that manifests when a person attempts to stop using a particular substance (e.g., tremors, racing pulse). Brain scientists now understand that psychological factors are central to addictive disorders and are often the most difficult to treat.

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