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Szűcs, Dénes; Soltész, Fruzsina (2012)
Publisher: BioMed Central
Languages: English
Types: Article
Subjects: Numerical cognition, ERP, Research Article, Neurosciences. Biological psychiatry. Neuropsychiatry, EEG, RC321-571, Subthreshold response activation, Cellular and Molecular Neuroscience, Numerical distance effect, Conflict processing, Neurophysiology and neuropsychology, Stroop effect, Interference, QP351-495, Anterior cingulate cortex
RIGHTS : This article is licensed under the BioMed Central licence at http://www.biomedcentral.com/about/license which is similar to the 'Creative Commons Attribution Licence'. In brief you may : copy, distribute, and display the work; make derivative works; or make commercial use of the work - under the following conditions: the original author must be given credit; for any reuse or distribution, it must be made clear to others what the license terms of this work are. Abstract Background Several conflict processing studies aimed to dissociate neuroimaging phenomena related to stimulus and response conflict processing. However, previous studies typically did not include a paradigm-independent measure of either stimulus or response conflict. Here we have combined electro-myography (EMG) with event-related brain potentials (ERPs) in order to determine whether a particularly robust marker of conflict processing, the N450 ERP effect usually related to the activity of the Anterior Cingulate Cortex (ACC), is related to stimulus- or to response-conflict processing. EMG provided paradigm-independent measure of response conflict. In a numerical Stroop paradigm participants compared pairs of digits and pressed a button on the side where they saw the larger digit. 50% of digit-pairs were preceded by an effective cue which provided accurate information about the required response. 50% of trials were preceded by a neutral cue which did not communicate the side of response. Results EMG showed that response conflict was significantly larger in neutrally than in effectively cued trials. The N450 was similar when response conflict was high and when it was low. Conclusions We conclude that the N450 is related to stimulus or abstract, rather than to response conflict detection/resolution. Findings may enable timing ACC conflict effects. Peer Reviewed
  • The results below are discovered through our pilot algorithms. Let us know how we are doing!

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