The Effects of Taste and Consistency on Swallow Physiology in Younger and Older Healthy Individuals
- 1 August 2003
- journal article
- research article
- Published by American Speech Language Hearing Association in Journal of Speech, Language, and Hearing Research
- Vol. 46 (4), 977-989
- https://doi.org/10.1044/1092-4388(2003/076)
Abstract
Recent studies done on healthy older individuals have demonstrated elevated taste thresholds for sweet, sour, and salty taste. At suprathreshold levels, such individuals have also shown less ability to discriminate between different intensities of the same tastant. This study was designed to provide information on swallow timing and muscle contraction intensity variables in healthy older people during swallowing of liquid and cottage cheese consistencies in 3 taste conditions (sweet, salty, and sour). Taste and consistency were incorporated in the design of this study to determine not only the effect of taste and consistency independently, but also the effects of taste and consistency in combination. Surface electromyography (EMG) at 3 sites—the orbicularis oris inferior region, submental muscle region, and infrahyoid muscle region—were included in the study. Results revealed that the start of submental muscle activation was significantly later in older participants than in younger participants. The 3 taste conditions had higher EMG levels and shorter activation times than the no-taste condition, although different taste conditions and different muscle sites were affected differently. With thicker consistency, substantially increased EMG amplitude and duration were noted for all three sites. A more pronounced effect of taste was manifested as earlier submental or infrahyoid muscle activation when the three tastants were added to a thicker consistency. Interaction of taste, consistency, and age was also noted for onset time at the submental and infrahyoid sites.Keywords
This publication has 41 references indexed in Scilit:
- Surface Electromyographic and Electroglottographic Studies in Normal Subjects Under Two Swallow Conditions: Normal and During the Mendelsohn ManueverDysphagia, 2002
- The Role of the Insular Cortex in DysphagiaDysphagia, 1997
- Food identification, taste complaints, and depression in younger and older adultsExperimental Aging Research, 1996
- Bitter taste in aging: Compound-specific decline in sensitivityPhysiology & Behavior, 1994
- Sensory Perception and Pleasantness of Food Flavors in Elderly SubjectsJournal of Gerontology, 1994
- Missing IngredientsJournal of Nutrition For the Elderly, 1990
- Taste: Robust across the Age Span?Annals of the New York Academy of Sciences, 1989
- Suprathreshold sour taste intensity and pleasantness perception with agePhysiology & Behavior, 1988
- Gustatory responsiveness of fibers in the hamster glossopharyngeal nerveJournal of Neurophysiology, 1988
- The organization of taste sensibilities in hamster chorda tympani nerve fibers.The Journal of general physiology, 1988