| The Influence of Stimulus Taste and Chemesthesis on Tongue-movement Timing in Swallowing. | |
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MedLine Citation:
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PMID: 22199186 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE: To explore the influence of taste and trigeminal irritation (chemesthesis) on durational aspects of tongue-movement in liquid swallowing, controlling for the influence of perceived taste intensity. METHOD: Electromagnetic midsagittal articulography was used to trace tongue movements during discrete liquid swallowing with five liquids: water, three moderate concentration tastants without odor (sweet, sour, sweet-sour) and a high concentration of citric acid (sour taste plus chemesthesis). Participants were 33 healthy adults in two gender-balanced, age-stratified groups (under/over 50). Perceived taste intensity was measured using the Generalized Labeled Magnitude Scale. Tongue movement sequencing and durations of the composite tongue-movement envelope and component events (rise-phase, location of first movement peak, release-phase) were calculated. RESULTS: No obligate sequence of tongue segment movement was observed. Overall durations and the timing of the first movement peak were significantly longer with water than with the moderate concentration of sweet-sour liquid. Perceived taste intensity did not modulate stimulus effects in a significant way. The expected pattern of shorter movement durations with the high concentration of citric acid was not seen. CONCLUSIONS: A chemesthetic-taste stimulus of high citric acid did not influence the durations of tongue movements compared to those seen during the swallowing of moderate concentration tastants and water. |
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Authors:
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Catriona M Steele; Pascal H H M van Lieshout; Cathy A Pelletier |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-22 |
Journal Detail:
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Title: Journal of speech, language, and hearing research : JSLHR Volume: - ISSN: 1558-9102 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9705610 Medline TA: J Speech Lang Hear Res Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Toronto Rehabilitation Institute, Toronto, Canada. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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