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Identifying the neural circuitry of alcohol craving and relapse vulnerability

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ABSTRACT

With no further intervention, relapse rates in detoxified alcoholics are high and usually exceed 80% of all detoxified patients. It has been suggested that stress and exposure to priming doses of alcohol and to alcohol-associated stimuli (cues) contribute to the relapse risk after detoxification. This article focuses on neuronal correlates of cue responses in detoxified alcoholics. Current brain imaging studies indicate that dysfunction of dopaminergic, glutamatergic and opioidergic neurotransmission in the brain reward system (ventral striatum including the nucleus accumbens) can be associated with alcohol craving and functional brain activation in neuronal systems that process attentional relevant stimuli, reward expectancy and experience. Increased functional brain activation elicited by such alcohol-associated cues predicted an increased relapse risk, whereas high brain activity elicited by affectively positive stimuli may represent a protective factor and was correlated with a decreased prospective relapse risk. These findings are discussed with respect to psychotherapeutic and pharmacological treatment options.
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Keywords: Alcohol craving; dopamine; functional magnetic resonance imaging; opioids; relapse; reward system

Document Type: Research Article

Affiliations: 1: Department of Psychiatry and Psychotherapy, 2: Institute of Medical Psychology, 3: Charité Universitätsmedizin Berlin, Campus Charité Mitte, Germany and Department of Neuroscience, University of Pittsburgh, USA

Publication date: 2009-01-01

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