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    Rapid modulation of sensory processing induced by stimulus conflict.

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    369.8 Kb
    Date
    2011-09
    Authors
    Appelbaum, Lawrence Gregory
    Boehler, CN
    Chen, WD
    Smith, DV
    Woldorff, Marty G
    Repository Usage Stats
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    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.
    Type
    Journal article
    Subject
    Adult
    Analysis of Variance
    Brain
    Brain Mapping
    Conflict (Psychology)
    Electroencephalography
    Evoked Potentials, Visual
    Female
    Functional Laterality
    Humans
    Male
    Photic Stimulation
    Reaction Time
    Visual Pathways
    Young Adult
    Permalink
    https://hdl.handle.net/10161/13538
    Published Version (Please cite this version)
    10.1162/jocn.2010.21575
    Publication Info
    Appelbaum, Lawrence Gregory; Boehler, CN; Chen, WD; Smith, DV; & Woldorff, Marty G (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.
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    Scholars@Duke

    Appelbaum

    Lawrence Gregory Appelbaum

    Associate Professor in Psychiatry and Behavioral Sciences
    Greg Appelbaum is an Associate Professor in the Department of Psychiatry and Behavioral Sciences in the Duke University School of Medicine. He is a member of the Brain Stimulation Division of Psychiatry, where he directs the Human Performance Optimization lab (Opti Lab) and the Brain Stimulation Research Center.  Dr. Appelbaum cor
    Woldorff

    Marty G. Woldorff

    Professor of Psychiatry and Behavioral Sciences
    Dr. Woldorff's main research interest is in the cognitive neuroscience of attention. At each and every moment of our lives, we are bombarded by a welter of sensory information coming at us from a myriad of directions and through our various sensory modalities -- much more than we can fully process. We must continuously select and extract the most important information from this welter of sensory inputs. How the human brain accomplishes this is one of the core challenges of modern cognitive neuro
    Alphabetical list of authors with Scholars@Duke profiles.
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    Articles written by Duke faculty are made available through the campus open access policy. For more information see: Duke Open Access Policy

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