Functional definition of the N450 event-related brain potential marker of conflict processing: a numerical stroop study.

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. 5

SUBMITTER: Szucs D 

PROVIDER: S-EPMC3383462 | biostudies-literature | 2012 Mar

REPOSITORIES: biostudies-literature