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Decision Making, Affect, and LearningAttention and Performance XXIII$
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Mauricio R. Delgado, Elizabeth A. Phelps, and Trevor W. Robbins

Print publication date: 2011

Print ISBN-13: 9780199600434

Published to Oxford Scholarship Online: May 2011

DOI: 10.1093/acprof:oso/9780199600434.001.0001

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Abnormalities in monetary and other non-drug reward processing in drug addiction

Abnormalities in monetary and other non-drug reward processing in drug addiction

Chapter:
(p.445) Chapter 21 Abnormalities in monetary and other non-drug reward processing in drug addiction
Source:
Decision Making, Affect, and Learning
Author(s):

Rita Z. Goldstein

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780199600434.003.0021

Adaptations of the reward circuit to intermittent and chronic supraphysiological stimulation by drugs increase reward thresholds. As a consequence, response to non-drug reinforcers in individuals with chronic drug use or addiction, may be decreased. Clinical symptoms include anhedonia and compulsive drug use, at the expense of the attainment of other rewarding experiences and despite detrimental consequences to the individual's functioning. While most addiction studies focus on the increased valuation of drug reward and drug-related cues, this chapter instead reviews the behavioural and neurobiological evidence for decreased valuation of non-drug reinforcers and cues. Future research should directly address the following question: is processing of drug reward enhanced at the expense of non drug-related reward (at least in certain subgroups of addicted individuals)? Or are these two processes independent?

Keywords:   reward, drug addicts, valuation, non-drug reinforcers, anhedonia, drug use

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