Cited by 46Neurotransmitter Receptor Influence on BehaviorNeural and Behavioral Psychology StudiesMemory and Neural Mechanisms

Disruption of endogenous opioid activity during instrumental learning enhances habit acquisition

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Wassum, K.M., Cely, I.C., Maidment, N.T., Balleine, B.W.·2009·Neuroscience

Abstract

Considerable evidence suggests that in instrumental conditioning rats learn the relationship between actions and their consequences, or outcomes. Such goal-directed actions are sensitive to changes in outcome value. The present study assessed the role of the endogenous opioid system in goal-directed reward learning. In two experiments, rats were trained to lever press for food pellets either under vehicle or naloxone-induced opioid receptor blockade. Specific satiety procedures were used for outcome devaluation, and the effect of this devaluation on instrumental responding was then tested in extinction. In Experiment 1 outcome devaluation resulted in a reduction in lever pressing in rats that were trained after vehicle injections, indicating that actions in these rats were goal-directed. In contrast, actions in rats trained under naloxone were insensitive to outcome devaluation when tested off drug, suggesting that lever pressing had become habitual in these rats. Interestingly, in Experiment 2 naloxone-induced habitual behavior was shown to be specific to the context in which the training occurred under naloxone; rats showed normal sensitivity to outcome devaluation when tested in an alternate vehicle-trained context. Additionally, in Experiment 2 we found that the acute administration of naloxone on test had no effect in itself, indicating that opioid receptor-related processes contribute to the acquisition of goal-directed actions and not to their general performance. These data suggest that an intact endogenous opioid system is necessary for normal goal-directed learning and more importantly, reveal that a compromised endogenous opioid system during learning enhances the habitual control of actions.

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Crossref · 10.1016/j.neuroscience.2009.06.071

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  • In the intact animal, there is likely a dynamic interdependency between goal-directed and habitual systems, and control likely emerges simultaneously and competitively.

    “However, it is likely that in the intact animal, there is a dynamic interdependency between goal-directed and habitual systems and that control is likely to emerge simultaneously and competitively (Wassum et al., 2009).”

    From Goals and Habits in the Brain (2013) · cites this paper as Wassum et al., 2009

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Research works printed but not linked: 1

  1. Dickinson A Balleine BW Gallistel CR The role of learning in motivation Learning, Motivation and Emotion 2002 Volume 3 of Steven’s Handbook of Experimental Psychology, vol. 3 John Wiley & Sons New York

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Authors
Wassum, K. M., Cely, I. C., Maidment, N. T., & Balleine, B. W.
Affiliations
  • University of California, Los Angeles (US)
  • The University of Sydney (AU)
Corresponding author
Wassum, K.M.
Venue
Neuroscience
Publisher
Elsevier BV
Published
2009-10
Volume
163
Issue
3
Pages
770-780
ISSN
0306-4522 (ISSN-L)
OpenAlex
W2057784646
Cited by
46
References
46
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2023: 1 · 2022: 6 · 2020: 2 · 2019: 6 · 2018: 3 · 2017: 1 · 2016: 4 · 2015: 2 · 2014: 7 · 2013: 3 · 2012: 2
FWCI
0.97
Type
journal article
Language
en
Open access
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute on Alcohol Abuse and Alcoholism (R01AA018014, AA18014)
  • National Institute on Drug Abuse (F31DA023774, P50DA005010, DA05010, DA-09359, R01DA009359)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
endogenous opioid system, opioid receptor blockade, naloxone, operant conditioning, habit formation, goal-directed behavior, outcome devaluation, extinction, reward learning, context specificity
MeSH terms
Animals, Conditioning, Operant, Discrimination, Psychological, Habituation, Psychophysiologic, Learning, Male, Naloxone, Narcotic Antagonists, Receptors, Opioid, Rats, Sprague-Dawley, Rats

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