An event-related fMRI study on risk taking by healthy individuals of high or low impulsiveness

Tatia M.C. Lee, Chetwyn C.H. Chan, Shi hui Han, Ada W.S. Leung, Peter T. Fox, Jia Hong Gao

Research output: Contribution to journalArticle

24 Scopus citations

Abstract

This event-related functional Magnetic Resonance Imaging study examined the differential neural activities associated with a Risky-Gains task in 18 healthy individuals of high (n = 9) or low (n = 9) impulsiveness, according to their scores on the Barratt Impulsiveness Scale (BIS). The neural activities of people belonging to the high and low impulsiveness groups were monitored by a 3T MRI scanner while they were performing the Risky-Gains task. We demonstrated that a stronger activation in the insula-orbitofrontal-parietal regions was found in the high impulsiveness group compared to the low impulsiveness group. However, the levels of activation in the lateral prefrontal and anterior cingulate regions did not differ between the two groups. The findings suggest that the neural substrates of comprehension of cognitive and affective information associated with risk-taking decision making may vary according to the impulsiveness among healthy individuals.

Original languageEnglish (US)
Pages (from-to)138-141
Number of pages4
JournalNeuroscience Letters
Volume438
Issue number2
DOIs
StatePublished - Jun 20 2008

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Keywords

  • Anterior cingulate cortex
  • Dorsolateral prefrontal cortex
  • Insula
  • Orbitofrontal cortex
  • Parietal cortex
  • Risk taking

ASJC Scopus subject areas

  • Neuroscience(all)

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