The Influence of Stimulus Taste and Chemesthesis on Tongue Movement Timing in Swallowing

Autor/inn/en	Steele, Catriona M.; van Lieshout, Pascal H. H. M.; Pelletier, Cathy A.
Titel	The Influence of Stimulus Taste and Chemesthesis on Tongue Movement Timing in Swallowing
Quelle	In: Journal of Speech, Language, and Hearing Research, 55 (2012) 1, S.262-275 (14 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
DOI	10.1044/1092-4388(2011/11-0012)
Schlagwörter	Stoichiometry; Sensory Experience; Human Body; Diagnostic Tests; Brain Hemisphere Functions; Adults; Measures (Individuals); Stimuli; Physiology + Suchen Sie Ihr Suchwort? Stöchiometrie; Sinnerfahrung; Menschlicher Körper; Diagnostic test; Diagnostischer Test; Messdaten; Anreizsystem; Physiologie
Abstract	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 5 liquids: water, 3 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 2 gender-balanced, age-stratified groups (under/over 50). Perceived taste intensity was measured using the Generalized Labeled Magnitude Scale (Bartoshuk, 2000; Bartoshuk et al., 2004). 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 with those seen during the swallowing of moderate concentration tastants and water. (As Provided).
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Update	2017/4/10