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    Neuroendocrine stress responses predict catecholamine-dependent working memory-related dorsolateral prefrontal cortex activity

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    Author
    Hernaus, D.
    Quaedflieg, C.W.E.M.
    Offermann, J.S.
    Date
    2018
    Journal
    Social Cognitive and Affective Neuroscience
    Publisher
    Oxford University Press
    Type
    Article
    
    Metadata
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    See at
    https://dx.doi.org/10.1093/scan/nsx122
    Abstract
    It is generally thought that the effect of acute stress on higher-order functions such as working memory is, for an important part, mediated by central catecholamine activity. However, little is known about the association between neuroendocrine stress responses and catecholamine-dependent working memory-related brain function in the absence of stress. Here, we investigate for the first time in healthy humans (n=18) how neuroendocrine responses to stress (cortisol and alphaamylase) relate to fronto-parietal working memory activity changes in response to atomoxetine, a noradrenaline transporter inhibitor that selectively increases extracellular cortical dopamine and noradrenaline. We observed positive correlations between stress-induced cortisol (Pearson's r = 0.75, P < 0.001) and alpha amylase (r = 0.69, P = 0.02) increases and catecholamine-dependent working memory-related activity in dorsolateral prefrontal cortex. Stress-induced cortisol increases furthermore correlated with supramarginal gyrus working memory-related activity (r = 0.79, P < 0.001). Comparing high vs low stress responders revealed that these correlations were driven by decreased working memory activity on placebo and greater working memory activity increases following atomoxetine in high stress responders. These results further corroborate the notion that neuroendocrine responses to stress are an informative proxy of catecholamine function relevant to higher order functions and provide novel hints on the complex relationship between acute stress, catecholamine function and working memory. Copyright The Author (2017).
    Sponsors
    DH's research is funded by a Kootstra post-doctoral fellowship and a Brains Unlimited pioneer grant (grant no: S.2015.1.02). TvA's research is funded by NIMH, and a ZonMW VIDI grant (grant no: 91712394). CW is funded by a Netherlands Organization for Scientific Research (NWO) Rubicon grant (grant no: 446-15-003, 2015).
    Keyword
    Cortisol
    Dopamine
    Neuroimaging
    Noradrenaline
    Prefrontal cortex
    Stress
    Working memory
    Identifier to cite or link to this item
    https://www.scopus.com/inward/record.uri?eid=2-s2.0-85040632893&doi=10.1093%2fscan%2fnsx122&partnerID=40&md5=124d416b2b2097bca80190d5922f132a; http://hdl.handle.net/10713/9118
    ae974a485f413a2113503eed53cd6c53
    10.1093/scan/nsx122
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