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    block this user Alexander Shackman

    Post Doctorate

    UW-Madison
    University of Wisconsin-Madison

    Right dorsolateral prefrontal cortical activity and behavioral inhibition.

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    Individuals show marked variation in their responses to threat. Such individual differences in behavioral inhibition play a profound role in mental and physical well-being. Behavioral inhibition is thought to reflect variation in the sensitivity of a distributed neural system responsible for generating anxiety and organizing defensive responses to threat and punishment. Although progress has been made in identifying the key constituents of this behavioral inhibition system in humans, the involvement of dorsolateral prefrontal cortex (DLPFC) remains unclear. Here, we acquired self-reported Behavioral Inhibition System Sensitivity scores and high-resolution electroencephalography from a large sample (n= 51). Using the enhanced spatial resolution afforded by source modeling techniques, we show that individuals with greater tonic (resting) activity in right-posterior DLPFC rate themselves as more behaviorally inhibited. This observation provides novel support for recent conceptualizations of behavioral inhibition and clues to the mechanisms that might underlie variation in threat-induced negative affect.

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    Description

    Title : Right dorsolateral prefrontal cortical activity and behavioral inhibition.
    Author(s) : Alexander J Shackman, Brenton W McMenamin, Jeffrey S Maxwell, Lawrence L Greischar, Richard J Davidson
    Abstract : Individuals show marked variation in their responses to threat. Such individual differences in behavioral inhibition play a profound role in mental and physical well-being. Behavioral inhibition is thought to reflect variation in the sensitivity of a distributed neural system responsible for generating anxiety and organizing defensive responses to threat and punishment. Although progress has been made in identifying the key constituents of this behavioral inhibition system in humans, the involvement of dorsolateral prefrontal cortex (DLPFC) remains unclear. Here, we acquired self-reported Behavioral Inhibition System Sensitivity scores and high-resolution electroencephalography from a large sample (n= 51). Using the enhanced spatial resolution afforded by source modeling techniques, we show that individuals with greater tonic (resting) activity in right-posterior DLPFC rate themselves as more behaviorally inhibited. This observation provides novel support for recent conceptualizations of behavioral inhibition and clues to the mechanisms that might underlie variation in threat-induced negative affect.
    Keywords : electroencephalography, fear, female, functional laterality, functional laterality physiology, humans, individuality, inhibition (psychology), prefrontal cortex, prefrontal cortex physiology, stress, psychological, psychological physiopathology, young adu

    Subject : unspecified
    Area : Other
    Language : English
    Year : 2009

    Affiliations UW-Madison
    Journal : Psychological Science
    Volume : 20
    Issue : 12
    Pages : 1500-1506
    Url : http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=2858783&tool=pmcentrez&rendertype=abstract

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