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TITLE: A unified framework for addiction: Vulnerabilities in the decision process
AUTHORS: A. David Redish, Steve Jensen, Adam Johnson
ABSTRACT: The understanding of decision-making systems has come together in recent years
to
form a unified theory of decision-making in the mammalian brain as arising from multiple,
interacting systems (a planning system, a habit system, and a situation-recognition
system).
This unified decision-making system has multiple potential access points through which it
can be driven to make maladaptive choices, particularly choices which entail seeking of
certain drugs or behaviors. We identify ten key vulnerabilities in the system: (1) moving
away from homeostasis, (2) changing allostatic set points, (3) euphorigenic reward-like
signals, (4) overvaluation in the planning system, (5) incorrect search of
situation-action-outcome relationships, (6) misclassification of situations, (7)
overvaluation in the habit system, (8) a mismatch in the balance of the two decision
systems, (9) over-fast discounting processes, and (10) changed learning rates. These
vulnerabilities provide a taxonomy of potential problems with decision-making systems.
Although each vulnerability can drive an agent to return to the addictive choice, each
vulnerability will also produce a characteristic symptomology. Different drugs, different
behaviors, and different individuals are likely to access different vulnerabilities. This
has implications for an individuals susceptibility to addiction and the transition to
addiction, for the potential for relapse, and for the potential for treatment.
KEYWORDS: addiction, gambling, decision-making, striatum, hippocampus, frontal cortex,
dopamine
FULL TEXT:
http://www.bbsonline.org/Preprints/Redish-09282006/Referees/
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Please DO NOT respond to this email. Please note that this is NOT a formal invitation. If
you wish to submit a proposal for commentary and/or suggest potential commentators,
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http://www.bbsonline.org/perl/commentary/commproposal?authordir=Redish-0928…
* If you only wish to suggest potential commentators, please ignore prompts to
submit a proposal with expertise information.
* If you experience technical difficulties, please email bbs(a)bbsonline.org.
* Please respond to this Call no later than January 28, 2008
NOTE: Behavioral and Brain Sciences (BBS) is an international, interdisciplinary journal
providing Open Peer Commentary on important and controversial current research in the
biobehavioral and cognitive sciences. Commentators must be BBS Associates, or suggested
by a BBS Associate. If you are not a BBS Associate, please follow the instructions
linked below:
http://www.bbsonline.org/Instructions/associnst.html
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Paul Bloom - Editor
Barbara Finlay - Editor
Behavioral and Brain Sciences
bbs(a)bbsonline.org
http://www.bbsonline.org
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