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Uniformity of olfactory loss in aging
1John B. Pierce Foundation Laboratory, New Haven, Connecticut.
Annals of the New York Academy of Sciences
|January 1, 1989
Summary
Human olfaction significantly declines with age, affecting odor perception, identification, and memory. This gradual decline may go unnoticed, posing potential nutritional and safety risks for older adults.
Area of Science:
- Neuroscience
- Sensory Science
- Gerontology
Background:
- Human olfaction undergoes age-related changes, with most research comparing young and elderly individuals.
- Existing studies consistently indicate a decline in olfactory function with advancing age.
Purpose of the Study:
- To synthesize existing knowledge on age-related olfactory decline.
- To highlight the gradual nature of olfactory deterioration and its implications.
Main Methods:
- Review of existing literature comparing olfactory abilities across different age groups.
- Analysis of studies examining olfactory function in middle-aged and elderly populations.
Main Results:
- Elderly individuals exhibit higher odor detection thresholds and reduced ability to perceive, discriminate, identify, and remember odors.
- Olfactory decline appears to begin early and progress gradually, potentially leading to unawareness of deficits.
- Diminished olfactory function can impact food flavor perception and increase risks related to nutrition and safety.
Conclusions:
- Age-related olfactory decline is a pervasive phenomenon affecting multiple aspects of smell.
- The gradual onset of olfactory loss may mask its severity, leading to potential risks.
- Longitudinal studies are needed to precisely determine the rate of decline and explore interventions to mitigate olfactory loss.