Fast fronto-parietal cortical dynamics of conflict detection and context updating in a flanker task
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RESEARCH ARTICLE
Fast fronto-parietal cortical dynamics of conflict detection and context updating in a flanker task Christopher R. Brydges1,2
•
Francisco Barcelo´3 • An T. Nguyen1,4 • Allison M. Fox1,4
Received: 22 November 2019 / Revised: 4 August 2020 / Accepted: 16 August 2020 Springer Nature B.V. 2020
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. Keywords Response inhibition Context updating Conflict detection Cognitive control Information theory Residue iteration decomposition
Introduction Cognitive control refers to a group of processes associated with performance of specific tasks through appropriate adjustments in executive attention and response selection, whilst minimizing interference from conflicting information (Botvinick et al. 2001, 2004), and is associated with neural activation across a widely distributed fronto-parietal
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11571-020-09628-z) contains supplementary material, which is available to authorized users. & Christopher R. Brydges [email protected] 1
School of Psychological Science (M304), University of Western Australia, 35 Stirling Highway, Perth, WA 6009, Australia
2
Department of Human Development and Family Studies, Colorado State University, Fort Collins, USA
3
Laboratory of Neuropsychology, University of the Balearic Islands, Majorca, Spain
4
Neurocognitive Development Unit, School of Psychological Science, University of Western Australia, Perth, Australia
cortical network for cognitive control (Niendam et al. 2012). Event-related potential (ERP) studies have consistently reported a series of peaks putatively contributed by this fronto-parietal network and associated with two temporarily contiguous higher-order cognitive processes: conflict detection and context updating. These two cognitive operations have been most notably associated with the frontal N2 (circa 200–350 ms post-
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