Cited by 85Gambling Behavior and TreatmentsNeurotransmitter Receptor Influence on BehaviorNeural and Behavioral Psychology Studies

Uncertainty exposure causes behavioural sensitization and increases risky decision-making in male rats: toward modelling gambling disorder

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Zeeb, Fiona D., Li, Zhaoxia, Fisher, Daniel C., Zack, Martin H., Fletcher, Paul J.·2017·Journal of Psychiatry and Neuroscience

Abstract

Background: An animal model of gambling disorder, previously known as pathological gambling, could advance our understanding of the disorder and help with treatment development. We hypothesized that repeated exposure to uncertainty during gambling induces behavioural and dopamine (DA) sensitization — similar to chronic exposure to drugs of abuse. Uncertainty exposure (UE) may also increase risky decision-making in an animal model of gambling disorder. Methods: Male Sprague Dawley rats received 56 UE sessions, during which animals responded for saccharin according to an unpredictable, variable ratio schedule of reinforcement (VR group). Control animals responded on a predictable, fixed ratio schedule (FR group). Rats yoked to receive unpredictable reward were also included (Y group). Animals were then tested on the Rat Gambling Task (rGT), an analogue of the Iowa Gambling Task, to measure decision-making. Results: Compared with the FR group, the VR and Y groups experienced a greater locomotor response following administration of amphetamine. On the rGT, the FR and Y groups preferred the advantageous options over the risky, disadvantageous options throughout testing (40 sessions). However, rats in the VR group did not have a significant preference for the advantageous options during sessions 20–40. Amphetamine had a small, but significant, effect on decision-making only in the VR group. After rGT testing, only the VR group showed greater hyperactivity following administration of amphetamine compared with the FR group. Limitations: Reward uncertainty was the only gambling feature modelled. Conclusion: Actively responding for uncertain reward likely sensitized the DA system and impaired the ability to make optimal decisions, modelling some aspects of gambling disorder.

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  1. Hodgins DC, Stea JN, Grant JE. Gambling disorders. Lancet 2011;378:1874-84.

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Authors
Zeeb, F. D., Li, Z., Fisher, D. C., Zack, M. H., & Fletcher, P. J.
Affiliations
Centre for Addiction and Mental Health (CA)
Venue
Journal of Psychiatry and Neuroscience
Published
2017-11
Volume
42
Issue
6
Pages
404-413
ISSN
  • 1180-4882 (ISSN-L)
  • 1488-2434
OpenAlex
W2765768211
Cited by
85
References
45
Citations by year
2025: 5 · 2024: 3 · 2023: 5 · 2022: 5 · 2021: 6 · 2020: 49 · 2019: 8 · 2018: 4
FWCI
20.64
Type
journal article
Language
en
Open access
Locations
  • Journal of Psychiatry and Neuroscience (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Center for Responsible Gaming
  • University of Toronto
  • Campbell Family Mental Health Research Institute
  • Department of Psychiatry, University of Toronto
  • Canadian Institutes of Health Research
Topics
  • Social Sciences › Psychology › Clinical Psychology › Gambling Behavior and Treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
Keywords
gambling addiction, variable-ratio schedules, risky decision making, dopamine sensitization, amphetamine, locomotor hyperactivity, Iowa Gambling Task
MeSH terms
Amphetamine, Central Nervous System Stimulants, Animals, Decision Making, Disease Models, Animal, Gambling, Male, Motor Activity, Reinforcement Schedule, Reward, Saccharin, Stress, Psychological, Rats, Sprague-Dawley, Uncertainty

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