Evidence map›Paper›PMID 24132052›Full record

Trial reportNeuropsychopharmacology : official publication of the American College of Neuropsychopharmacology2014

Abnormal brain activity during a reward and loss task in opiate-dependent patients receiving methadone maintenance therapy.

Victoria B Gradin, Alex Baldacchino, David Balfour, Keith Matthews, J Douglas Steele

Abstract readRandomized Controlled Trial
In one paragraph

Trial report in Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 6 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

34 citing papers in PubMed, 6 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Intact responses to non-drug rewards in long-term opioid maintenance treatment.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2019
    Pooled it
  4. Pooled it
  5. Pooled it
  6. Pooled it
  7. Trial
  8. Trial
  9. Trial
  10. Trial
  11. Trial
  12. Article
  13. Opioid-Induced Regulation of Cortical Circular-International journal of molecular sciences · 2025
    Article
  14. Article
  15. Review
  16. Article
  17. Blunted Expected Reward Value Signals in Binge Alcohol Drinkers.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2023
    Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Victoria B Gradin1] Department of Psychiatry, Medical Research Institute, University of Dundee, Dundee, UK [2] CIBPsi, Faculty of Psychology, Universidad de la República, Montevideo, Uruguay.
Alex Baldacchino1] Department of Psychiatry, Medical Research Institute, University of Dundee, Dundee, UK [2] NHS Fife Addiction Services, Scotland, UK.
David BalfourDepartment of Psychiatry, Medical Research Institute, University of Dundee, Dundee, UK.
Keith MatthewsDepartment of Psychiatry, Medical Research Institute, University of Dundee, Dundee, UK.
J Douglas SteeleDepartment of Psychiatry, Medical Research Institute, University of Dundee, Dundee, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

A core feature of human drug dependency is persistence in seeking and using drugs at the expense of other life goals. It has been hypothesized that addiction is associated with overvaluation of drug-related rewards and undervaluation of natural, nondrug-related rewards. Humans additionally tend to persist in using drugs despite adverse consequences. This suggests that the processing of both rewarding and aversive information may be abnormal in addictions. We used fMRI to examine neural responses to reward and loss events in opiate-dependent patients receiving methadone maintenance treatment (MMT, n=30) and healthy controls (n=23) using nondrug-related stimuli. Half of the patients were scanned after/before daily methadone intake (ADM/BDM patient groups). During reward trials, patients as a whole exhibited decreased neural discrimination between rewarding and nonrewarding outcomes in the dorsal caudate. Patients also showed reduced neural discrimination in the ventral striatum with regard to aversive and nonaversive outcomes and failed to encode successful loss avoidance as a reward signal in the ventral striatum. Patients also showed decreased insula activation during the anticipation/decision phase of loss events. ADM patients exhibited increased loss signals in the midbrain/parahippocampal gyrus, possibly related to a disinhibition of dopamine neurons. This study suggests that patients with opiate dependency on MMT exhibit abnormal brain activations to nondrug-related rewarding and loss events. Our findings add support to proposals that treatments for opiate addiction should aim to increase the reward value of nondrug-related rewarding events and highlight the importance of potential abnormalities in aversive information processing.

Indexed as

Opioid-Related DisordersRewardAdultAnalysis of VarianceBrainBrain MappingFemaleHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingMaleMethadoneOxygenProbabilityTime FactorsYoung AdultMethadoneOxygen

Identifiers

PMID24132052
PMCPMC3924523

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.