The effect of preceding context on inhibition: An event-related fMRI study Academic Article uri icon

Overview

MeSH Major

  • Behavior
  • Brain
  • Magnetic Resonance Imaging

abstract

  • In this study we combined event-related fMRI with a parametric manipulation of the go nogo paradigm to examine the effect of preceding context on inhibitory processes. Nogo trials were preceded by either 1, 3, or 5 go trials and then compared to one another. Two distinct patterns of activation were associated with behavioral inhibition: First, the ventral prefrontal cortex, cingulate gyrus, and superior parietal regions showed a context effect with an increase in MR signal to nogo trials with increasing number of preceding go trials. Second, anterior regions in the supplementary and premotor cortex showed an increase in MR signal on the nogo condition after 5 preceding go trials, but not after only 1 or 3. A model using the BOLD response in our data was used to verify that the effect of context was not an artifact of the randomization scheme used in the design.

publication date

  • August 17, 2002

Research

keywords

  • Academic Article

Identity

Language

  • eng

Digital Object Identifier (DOI)

  • 10.1006/nimg.2002.1074

PubMed ID

  • 12030830

Additional Document Info

start page

  • 449

end page

  • 53

volume

  • 16

number

  • 2