Abstract：
:Dysregulation of the brain emotional systems that mediate arousal and stress is a key component of the pathophysiology of drug addiction. Drug addiction is a chronically relapsing disorder characterized by a compulsion to seek and take drugs and the development of dependence and manifestation of a negative emotional state when the drug is removed. Activation of brain stress systems is hypothesized to be a key element of the negative emotional state produced by dependence that drives drug-seeking through negative reinforcement mechanisms. The focus of the present review is on the role of two key brain arousal/stress systems in the development of dependence. Emphasis is placed on the neuropharmacological actions of corticotropin-releasing factor (CRF) and norepinephrine in extrahypothalamic systems in the extended amygdala, including the central nucleus of the amygdala, bed nucleus of the stria terminalis, and a transition area in the shell of the nucleus accumbens. Compelling evidence argues that these brain stress systems, a heretofore largely neglected component of dependence and addiction, play a key role in engaging the transition to dependence and maintaining dependence once it is initiated. Understanding the role of the brain stress and anti-stress systems in addiction not only provides insight into the neurobiology of the "dark side" of addiction but also provides insight into the organization and function of basic brain emotional circuitry that guides motivated behavior.
journal_name
Brain Resjournal_title
Brain researchauthors
Koob GFdoi
10.1016/j.brainres.2009.03.038subject
Has Abstractpub_date
2009-10-13 00:00:00pages
61-75eissn
0006-8993issn
1872-6240pii
S0006-8993(09)00602-7journal_volume
1293pub_type
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