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Related Experiment Video

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Three Laboratory Procedures for Assessing Different Manifestations of Impulsivity in Rats
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Brain structure correlates of emotion-based rash impulsivity.

N Muhlert1, A D Lawrence1

  • 1School of Psychology and Cardiff University Brain Research Imaging Centre (CUBRIC), Cardiff University, Cardiff, UK.

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|May 11, 2015
PubMed
Summary

Higher negative urgency, the tendency for rash action during intense negative emotions, is linked to smaller brain volumes in regions crucial for emotion regulation. This neurobiological insight sheds light on impulsivity differences.

Keywords:
Emotion regulationGrey matter volumeImpulsivityPersonalityUrgencyVoxel-based morphometry

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Area of Science:

  • Neuroscience
  • Psychology
  • Brain Imaging

Background:

  • Negative urgency, a personality trait, is associated with risky behaviors and psychopathology.
  • Neurobiological underpinnings of negative urgency are not well understood.

Purpose of the Study:

  • To investigate the association between trait negative urgency and regional grey matter volumes.
  • To identify brain structure correlates of negative urgency in healthy adults.

Main Methods:

  • Voxel-based morphometry (VBM) was used to analyze brain scans.
  • 152 healthy participants were included in the study.
  • Associations were examined controlling for other impulsivity traits and neuroticism.

Main Results:

  • Smaller volumes in the dorsomedial prefrontal cortex and right temporal pole were linked to higher negative urgency.
  • These associations persisted after controlling for confounding factors.
  • Higher negative urgency was also associated with smaller left ventral striatum volumes.

Conclusions:

  • Specific brain regions involved in emotion processing and regulation are associated with negative urgency.
  • Findings provide insight into the neurobiology of impulsivity and individual differences.
  • The results align with animal model findings on impulsivity.