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| Research article summary (published 7 Oct 2006): |
The effect of monosodium glutamate on parotid salivary flow in comparison to the response to representatives of the other four basic tastes.
Full Abstract
Parotid salivary flow was recorded from eight fit and healthy subjects using modified Lashley cups connected to an instantaneous flow meter in response to gustatory stimuli. The gustatory stimuli were monosodium glutamate (MSG), sodium chloride, sucrose, magnesium sulphate and citric acid. Stimuli were applied for 30 s, and repeated after the flows had returned to baseline following the rinse. Subjects were a significant source of variation for salivary response to each different test stimuli (p<0.001). The normalised salivary flow showed a strong correlation to concentration for all test stimuli (p<0.0001). The parotid salivary flow to MSG (umami) showed a dose-dependant response in which both Na(+) and glutamate ions contributed. The overall order of relative salivary flow responses from highest to lowest flows was citric acid (sour)>MSG (umami)>NaCl (salt)>sucrose (sweet)>=magnesium sulphate (bitter). The relative responses of the peak salivary flows showed the same ordered relation. The peak salivary flow provided a greater contribution to the response to citric acid, NaCl and MSG compared to the response to sucrose and magnesium sulphate.
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Author information
Author/s: Hodson, N A (NA); Linden, R W A (RW);
Affiliation: Primary Dental Care, King's College London Dental Institute at Guy's, King's and St Thomas' Hospitals, London SE5 9RW, UK. nicholas.hodson(-atsign-)kcl.ac.uk
Journal and publication information
Publication Type: Clinical Trial; Comparative Study; Journal Article
Journal: Physiology & behavior (Physiol Behav), published in United States. (Language: eng)
Reference: 2006-Dec; vol 89 (issue 5) : pp 711-7
Dates: Created 2006/11/24; Completed 2007/01/26;
PMID: 17028046, status: MEDLINE (last retrieval date: 12/26/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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