Cited by 65Memory Processes and InfluencesPosttraumatic Stress Disorder ResearchMemory and Neural Mechanisms

Acute effects of alcohol on intrusive memory development and viewpoint dependence in spatial memory support a dual representation model

Bisby, James A., King, John A., Brewin, Chris R., Burgess, Neil, Curran, H. Valerie·2010·Biological Psychiatry

Abstract

Background A dual representation model of intrusive memory proposes that personally experienced events give rise to two types of representation: an image-based, egocentric representation based on sensory-perceptual features; and a more abstract, allocentric representation that incorporates spatiotemporal context. The model proposes that intrusions reflect involuntary reactivation of egocentric representations in the absence of a corresponding allocentric representation. We tested the model by investigating the effect of alcohol on intrusive memories and, concurrently, on egocentric and allocentric spatial memory.Methods With a double-blind independent group design participants were administered alcohol (.4 or .8 g/kg) or placebo. A virtual environment was used to present objects and test recognition memory from the same viewpoint as presentation (tapping egocentric memory) or a shifted viewpoint (tapping allocentric memory). Participants were also exposed to a trauma video and required to detail intrusive memories for 7 days, after which explicit memory was assessed.Results There was a selective impairment of shifted-view recognition after the low dose of alcohol, whereas the high dose induced a global impairment in same-view and shifted-view conditions. Alcohol showed a dose-dependent inverted "U"-shaped effect on intrusions, with only the low dose increasing the number of intrusions, replicating previous work. When same-view recognition was intact, decrements in shifted-view recognition were associated with increases in intrusions.Conclusions The differential effect of alcohol on intrusive memories and on same/shifted-view recognition support a dual representation model in which intrusions might reflect an imbalance between two types of memory representation. These findings highlight important clinical implications, given alcohol's involvement in real-life trauma.

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Crossref · 10.1016/j.biopsych.2010.01.010

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Authors
Bisby, J. A., King, J. A., Brewin, C. R., Burgess, N., & Curran, H. V.
Affiliations
  • University College London (GB)
  • UCL Queen Square Institute of Neurology (GB)
Venue
Biological Psychiatry
Publisher
Elsevier BV
Published
2010-08
Volume
68
Issue
3
Pages
280-286
ISSN
0006-3223 (ISSN-L)
OpenAlex
W2013777828
Cited by
65
References
59
Citations by year
2026: 2 · 2025: 2 · 2024: 5 · 2023: 3 · 2022: 2 · 2021: 3 · 2020: 5 · 2019: 5 · 2018: 2 · 2017: 7 · 2016: 3 · 2015: 3 · 2014: 2 · 2013: 8 · 2012: 6
FWCI
3.68
Type
journal article
Language
en
Open access
closed
Locations
  • Biological Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Funders
  • UK Economic and Social Research Council
  • UK Medical Research Council
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Social Sciences › Psychology › Clinical Psychology › Posttraumatic Stress Disorder Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
alcohol, allocentric spatial memory, viewpoint dependence, recognition memory, dose-dependent effects, trauma, virtual reality, memory reactivation
MeSH terms
Adaptation, Psychological, Adolescent, Adult, Ethanol, Analysis of Variance, Central Nervous System Depressants, Dose-Response Relationship, Drug, Double-Blind Method, Female, Humans, Male, Memory, Models, Psychological, Reference Values, Repression, Psychology, Stress Disorders, Post-Traumatic, Recognition, Psychology, Young Adult

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