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Oral perception of liquid volume changes with age.
E Kamarunas1, G H McCullough2, M Mennemeier3
1Department of Communication Sciences and Disorders, James Madison University, Harrisonburg, VA, USA.
Journal of Oral Rehabilitation
|May 14, 2015
Summary
Older adults need significantly more liquid volume to perceive changes in volume compared to younger adults. This age-related decline in oral perception impacts swallowing function.
Area of Science:
- Gerontology
- Swallowing Physiology
- Sensory Perception
Background:
- Bolus volume significantly impacts swallowing physiology and disorders.
- Oral perception of bolus volume has not been studied in relation to normal aging.
- Age-related sensory changes in the oral cavity and swallowing function are documented.
Purpose of the Study:
- To determine the relationship between liquid volume and oral perception.
- To investigate age-related changes in the perception of bolus volume.
Main Methods:
- Healthy young and older adults participated in a prospective study.
- A magnitude estimation task was used to assess perception of five different water volumes.
- Volumes were delivered randomly to the oral cavity.
Main Results:
- Older adults required a fourfold increase in liquid volume to perceive a twofold increase in volume.
- This indicates a diminished perception of volume in older individuals compared to younger ones.
Conclusions:
- Age-related changes in oral perception of bolus volume are evident.
- These perceptual changes may inform future sensorineural rehabilitation strategies for swallowing.
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