Increases when teens have peers who use substances

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Unformatted text preview: reater concordance in MZ • Gene-Environment Interaction Heritability increases when teens have peers who use substances • Diathesis: May be higher tolerance DSM-5 Substance Use Disorder Problematic pattern of use impairs functioning. 2 or more Sx within 1 year • Failure to meet obligations • Repeated use in situations where physically dangerous • Repeated relationship problems • Tolerance • Withdrawal • Use for more time or greater amounts than intended • Desire or efforts to reduce or control use fail • Much time spent trying to obtain substance • Social, hobbies, or work activities, given up, reduced • Continued use despite known problems • Strong cravings for substance [Etiology, con’t…] Neurobiological: Dopamine linked to pleasure • Stimulated by almost all abused drugs • Vulnerability Model: People who become dependent may have dopamine system probs • Toxic Effect Model: Substance use damages dopamine system • Incentive-Sensitization Theory:...
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This document was uploaded on 01/16/2014.

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