Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

When a conflict task involves congruent, neutral, and incongruent conditions, it is possible to examine facilitation (neutral vs. congruent) and interference (incongruent vs. neutral) components. Very few studies investigated the brain areas that are specifically involved in facilitation or interference. We used functional magnetic resonance imaging while participants performed a magnitude conflict task (the size congruity paradigm). We observed four findings: (1) while most of the brain areas that were activated by conflict tasks showed interference effects, the intraparietal sulcus was the only region activated for both interference and facilitation components. (2) Two groups of participants could be distinguished based on the pattern of anterior cingulate cortex (ACC) activity, one with classical facilitation (congruent<neutral), one with reverse facilitation. (3) Functional connectivity analysis of the areas that were modulated by the conflict task revealed an anterior cingulate - lateral prefrontal cortex network and a dorsal parietal - premotor cortex network. We suggest that the former plays a role in cognitive control and conflict detection, whereas the latter participates in top-down selection of task-relevant stimuli and response mapping. (4) These networks were modulated by the two groups that we distinguished based on the ACC activation.

Original publication

DOI

10.1016/j.neuropsychologia.2008.05.025

Type

Journal article

Journal

Neuropsychologia

Publication Date

10/2008

Volume

46

Pages

2872 - 2879

Keywords

Attention, Brain Mapping, Cerebral Cortex, Conflict (Psychology), Functional Laterality, Humans, Inhibition (Psychology), Magnetic Resonance Imaging, Mental Processes, Principal Component Analysis, Reaction Time, Reference Values