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Aging effects on anatomy and neurophysiology of taste and smell.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mistretta, Charlotte M. |
| Copyright Year | 1984 |
| Abstract | Taste and smell have a primary role in food ingestion. Therefore, to understand why eating habits alter in elderly people, age-related differences in the chemical senses should be investigated. In early anatomical studies, substantial decreases in numbers of taste buds in old human and mouse circumvallate papillae were observed. However, recent investigations in humans, monkeys, and rats indicate that there is not a significant loss of taste buds in old age. Neurophysiological recordings from the chorda tympani nerve, innervating taste buds in fungiform papillae, demonstrate significant but small differences in response magnitudes for some chemicals in old rats. Greater age-related differences have been observed in the olfactory sense. Numbers of receptor neurons in the rat olfactory epithelium initially increase in adults and then decline in old animals; this decline is reflected in subsequent changes in the olfactory bulb. However, numbers of synapses in the bulb per receptor neuron are increased in the oldest rats, suggesting some compensatory mechanism. Differences in degree of aging effects in taste and smell might relate to the nature of receptors: a modified epithelial cell in taste versus a neuron in smell. However, in both sensory systems, large numbers of receptors remain even in old age. Since taste bud cells and olfactory receptors turn over and are replaced throughout life, the peripheral taste and smell systems might be relatively resistant to aging effects. |
| Starting Page | 35 |
| Ending Page | 35 |
| Page Count | 1 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://deepblue.lib.umich.edu/bitstream/handle/2027.42/73582/j.1741-2358.1984.tb00364.x.pdf;jsessionid=D2B49CCD26F151BBE259F8DBC880F1F0?sequence=1 |
| PubMed reference number | 6595203v1 |
| Volume Number | 3 |
| Issue Number | 2 |
| Journal | Gerodontology |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Ageusia Anatomic structures Behaviorial Habits Bud - CHV concept Cellular Phone Eating Disorders Esthesia Gonadotropin-Releasing Hormone Receptor Ingestion Monkeys Neurons Olfactory Epithelium Olfactory Nerve Peripheral Vascular Diseases Receptors, Odorant Science of neurophysiology Smell Perception Structure of chorda tympani Structure of fungiform papillae of tongue Structure of olfactory bulb Synapses Taste Buds Taste Perception Taste bud cell |
| Content Type | Text |
| Resource Type | Article |
