Rapid modulation of sensory processing induced by stimulus conflict.

Loading...
Thumbnail Image

Date

2011-09

Journal Title

Journal ISSN

Volume Title

Repository Usage Stats

167
views
146
downloads

Citation Stats

Abstract

Humans are constantly confronted with environmental stimuli that conflict with task goals and can interfere with successful behavior. Prevailing theories propose the existence of cognitive control mechanisms that can suppress the processing of conflicting input and enhance that of the relevant input. However, the temporal cascade of brain processes invoked in response to conflicting stimuli remains poorly understood. By examining evoked electrical brain responses in a novel, hemifield-specific, visual-flanker task, we demonstrate that task-irrelevant conflicting stimulus input is quickly detected in higher level executive regions while simultaneously inducing rapid, recurrent modulation of sensory processing in the visual cortex. Importantly, however, both of these effects are larger for individuals with greater incongruency-related RT slowing. The combination of neural activation patterns and behavioral interference effects suggest that this initial sensory modulation induced by conflicting stimulus inputs reflects performance-degrading attentional distraction because of their incompatibility rather than any rapid task-enhancing cognitive control mechanisms. The present findings thus provide neural evidence for a model in which attentional distraction is the key initial trigger for the temporal cascade of processes by which the human brain responds to conflicting stimulus input in the environment.

Department

Description

Provenance

Citation

Published Version (Please cite this version)

10.1162/jocn.2010.21575

Publication Info

Appelbaum, LG, DV Smith, CN Boehler, WD Chen and MG Woldorff (2011). Rapid modulation of sensory processing induced by stimulus conflict. J Cogn Neurosci, 23(9). pp. 2620–2628. 10.1162/jocn.2010.21575 Retrieved from https://hdl.handle.net/10161/13538.

This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.


Unless otherwise indicated, scholarly articles published by Duke faculty members are made available here with a CC-BY-NC (Creative Commons Attribution Non-Commercial) license, as enabled by the Duke Open Access Policy. If you wish to use the materials in ways not already permitted under CC-BY-NC, please consult the copyright owner. Other materials are made available here through the author’s grant of a non-exclusive license to make their work openly accessible.