Fast fronto-parietal cortical dynamics of conflict detection and context updating in a flanker task

Christopher R. Brydges, Francisco Barceló, An T. Nguyen, Allison M. Fox

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Recent research has found that the traditional target P3 consists of a family of P3-like positivities that can be functionally and topographically dissociated from one another. The current study examined target N2 and P3-like subcomponents indexing conflict detection and context updating at low- and high-order levels in the neural hierarchy during cognitive control. Electroencephalographic signals were recorded from 45 young adults while they completed a hybrid go/nogo flanker task, and Residue Iteration Decomposition (RIDE) was applied to functionally dissociate these peaks. Analyses showed a stimulus-locked frontal N2 revealing early detection and fast perceptual categorization of nogo, congruent and incongruent trials, resulting in frontal P3-like activity elicited by nogo trials in the latency-variable RIDE cluster, and by incongruent trials in the response-locked cluster. The congruent trials did not elicit frontal P3-like activity. These findings suggest that behavioral incongruency effects are related to intermediate and later stages of motor response re-programming.

Original languageEnglish
Pages (from-to)795-814
Number of pages20
JournalCognitive Neurodynamics
Volume14
Issue number6
DOIs
Publication statusPublished - 1 Dec 2020

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