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Three Laboratory Procedures for Assessing Different Manifestations of Impulsivity in Rats
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Reflection impulsivity in binge drinking: behavioural and volumetric correlates.

Paula Banca1,2,3, Iris Lange1, Yulia Worbe4

  • 1Department of Psychiatry, University of Cambridge, UK.

Addiction Biology
|February 14, 2015
PubMed
Summary

Binge drinkers show impaired decision-making, seeking less information before acting. This reduced evidence accumulation is linked to brain volume differences, particularly in the prefrontal cortex.

Keywords:
Binge drinkingdecision makingreflection impulsivityvoxel-based morphometry

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Decision Science

Background:

  • Decisional impulsivity, or reflection impulsivity, is altered in psychiatric disorders.
  • Binge drinking is a risk factor for alcohol use disorders and may involve impulsivity deficits.

Purpose of the Study:

  • To investigate decisional impulsivity in binge drinkers using two reflection impulsivity tasks and a delay discounting task.
  • To explore the neuroanatomical correlates of impaired reflection impulsivity in binge drinkers.

Main Methods:

  • Sixty binge drinkers and healthy volunteers completed the beads task and the Information Sampling Task (IST) for reflection impulsivity.
  • Delay discounting was assessed using the Monetary Choice Questionnaire.
  • Voxel-based morphometry analyzed brain volumes, correlating them with impulsivity measures.

Main Results:

  • Binge drinkers exhibited significantly lower evidence accumulation in the beads task compared to controls.
  • No group differences were found in the IST or delay discounting task.
  • Lower evidence accumulation in the beads task correlated with reduced dorsolateral prefrontal cortex and inferior parietal volumes.

Conclusions:

  • Binge drinking is associated with impaired reflection impulsivity, indicating a deficit in weighing future outcomes.
  • Decision-making deficits in binge drinkers may be a target for therapeutic interventions.