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    Mapping metabolic brain activation during human volitional swallowing: a positron emission tomography study using [18F]fluorodeoxyglucose.

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    Authors
    Harris, Mary Louise
    Julyan, Peter J
    Kulkarni, Bhavna
    Gow, David
    Hobson, Anthony
    Hastings, David L
    Zweit, Jamal
    Hamdy, Shaheen
    Affiliation
    Department of Gastrointestinal Science, University of Manchester, Hope Hospital, Manchester, UK. lou.harris@man.ac.uk
    Issue Date
    2005-04
    
    Metadata
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    Abstract
    We have previously shown that labelled water positron emission tomography (H2(15)O PET) can be used to identify regional cerebral blood flow (rCBF) changes in the human brain during volitional swallowing. (18F) fluorodeoxyglucose (FDG PET), by comparison, uses a glucose analogue to quantitatively measure regional cerebral glucose metabolism (rCMRglc) rather than rCBF. The main advantage of FDG PET is improved spatial resolution, and because of its pharmacodynamic properties, activation can be performed external to the scanner, allowing subjects to assume more physiologic positions. We therefore conducted a study of the brain's metabolic response while swallowing in the erect seated position, using FDG PET. Eight healthy male volunteers were studied with a randomised 2 scan paradigm of rest or water swallowing at 20-second intervals for 30 minutes. Data were analysed with SPM99 using multisubject conditions and covariates design. During swallowing, analysis identified increased rCMRglc (P<0.01) in the following areas: left sensorimotor cortex, cerebellum, thalamus, precuneus, anterior insula, left and right lateral postcentral gyrus, and left and right occipital cortex. Decreased rCMRglc were also seen in the right premotor cortex, right and left sensory and motor association cortices, left posterior insula and left cerebellum. Thus, FDG PET can be applied to measure the brain metabolic activity associated with volitional swallowing and has the advantage of normal task engagement. This has implications for future activation studies in patients, especially those suffering swallowing problems after brain injury.
    Citation
    Mapping metabolic brain activation during human volitional swallowing: a positron emission tomography study using [18F]fluorodeoxyglucose. 2005, 25 (4):520-6 J. Cereb. Blood Flow Metab.
    Journal
    Journal of Cerebral Blood Flow and Metabolism
    URI
    http://hdl.handle.net/10541/76781
    DOI
    10.1038/sj.jcbfm.9600042
    PubMed ID
    15689960
    Type
    Article
    Language
    en
    ISSN
    0271-678X
    ae974a485f413a2113503eed53cd6c53
    10.1038/sj.jcbfm.9600042
    Scopus Count
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