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    The relationship between sleep and cognition in Parkinson's disease: A meta-analysis

    Access Status
    Fulltext not available
    Authors
    Pushpanathan, M.E.
    Loftus, Andrea
    Thomas, M.G.
    Gasson, Natalie
    Bucks, R.S.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Pushpanathan, M.E. and Loftus, A.M. and Thomas, M.G. and Gasson, N. and Bucks, R.S. 2016. The relationship between sleep and cognition in Parkinson's disease: A meta-analysis. Sleep Medicine Reviews. 26: pp. 21-32.
    Source Title
    Sleep Medicine Reviews
    DOI
    10.1016/j.smrv.2015.04.003
    ISSN
    1087-0792
    Faculty
    Faculty of Health Sciences
    School
    Curtin School of Population Health
    URI
    http://hdl.handle.net/20.500.11937/88173
    Collection
    • Curtin Research Publications
    Abstract

    © 2015 Elsevier Ltd. It is well established that sleep disorders have neuropsychological consequences in otherwise healthy people. Studies of night-time sleep problems and cognition in Parkinson's disease (PD), however, paint a mixed picture, with many reporting no relationship between sleep problems and neuropsychological performance. This review aimed to meta-analyse this research and to examine the factors underlying these mixed results. A literature search was conducted of published and unpublished studies, resulting in 16 papers that met inclusion criteria. Data were analysed in the domains of: global cognitive function; memory (general, long-term verbal recognition, long-term verbal recall); and executive function (general, shifting, updating, inhibition, generativity, fluid reasoning). There was a significant effect of sleep on global cognitive function, long-term verbal recall, long-term verbal recognition, shifting, updating, generativity, and fluid reasoning. Although there are effects on memory and executive function associated with poor sleep in PD, the effects were driven by a small number of studies. Numerous methodological issues were identified. Further studies are needed reliably to determine whether disturbed sleep impacts on cognition via mechanisms of hypoxia, hypercapnia, sleep fragmentation, chronic sleep debt or decreased REM and/or slow wave sleep in PD, as this may have important clinical implications.

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