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Related Experiment Video

Updated: Apr 23, 2026

Three Laboratory Procedures for Assessing Different Manifestations of Impulsivity in Rats
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Response inhibition and its relation to multidimensional impulsivity.

Tilmann Wilbertz1, Lorenz Deserno2, Annette Horstmann3

  • 1Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.

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|September 22, 2014
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Summary

Impulsivity

Keywords:
IFGImpulsivityRewardStop signal taskUrgencyfMRI

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Impulsivity is a key trait linked to psychiatric disorders, particularly addiction.
  • Poor response inhibition is a facet of impulsivity, but its neural correlates are not fully understood.
  • Existing measures like the Barratt Impulsiveness Scale (BIS-11) and the UPPS questionnaire offer different perspectives on impulsivity.

Purpose of the Study:

  • To investigate how different facets of trait impulsivity relate to behavioral and neural measures of response inhibition.
  • To examine individual differences in response inhibition using a reward-modulated Stop-signal task during fMRI.

Main Methods:

  • Studied 52 healthy individuals with high or low scores on the BIS-11.
  • Utilized functional magnetic resonance imaging (fMRI) during a reward-modulated Stop-signal task.
  • Analyzed correlations between impulsivity measures (BIS-11, UPPS subdomains) and neural activity, specifically right inferior frontal gyrus/anterior insula (IFG/aI) and ventral striatum (VS) activation.

Main Results:

  • No significant behavioral or neural differences were found between high- and low-BIS-11 groups.
  • The UPPS subdomain 'Urgency' significantly predicted inter-individual variability in stop-signal reaction time (SSRT) and correlated negatively with right IFG/aI activation.
  • Ventral striatal (VS) activation during successful response inhibition was modulated by reward, but only participants with low Urgency effectively utilized this signal for improved inhibition.

Conclusions:

  • The relationship between impulsivity and response inhibition is complex and requires nuanced assessment.
  • Urgency, a specific facet of impulsivity, is crucial for understanding individual differences in response inhibition and the use of reward-based feedback.
  • Future research on impulsivity in psychiatric disorders should consider Urgency as a significant modulating factor for behavioral adaptation.