2 edition of Loss of olfactory sensitivity in older subjects. found in the catalog.
Loss of olfactory sensitivity in older subjects.
Gail N. Sampson
Written in English
|The Physical Object|
|Pagination||vi, 44 l.|
|Number of Pages||44|
Olfactory assessment has emerged as a novel approach. Doty 1 summarized studies documenting loss of olfactory discrimination in Alzheimer's disease, Parkinson's disease, progressive supranuclear palsy, and Huntington's disease and cited research attesting to diminished olfactory acuity in normal aging, schizophrenia, and vascular dementia. In particular, he reviewed 13 studies investigating olfaction in Cited by: Abstract. SUMMARY— The individual olfactory thresholds of 97 persons toward 18 odorants were analyzed statistically. There is a significant logarithmic deterioration with age, the average loss of sensitivity being 50% in 22 years. Any influence of sex or smoking is negligible.
-The olfactory pathway travels to location in the brain in which memories are formed and we simply mix this new sensory information with old memories.-The belief that we can smell so many different distinct odors is a psychological process referred to as an uncinate fit or olfactory hallucination. Jul 01, · The present results suggested that subjects working in perfume retail outlets were even better than controls in terms of suprathreshold odor discrimination. One explanation for this finding might be that PERF subjects already had a higher olfactory sensitivity than controls before they started to work in perfume retail freelancerscomic.com by:
Oct 25, · Intriguing Genes: Differences in how we smell things. Posted on October 25, I knew that some people have a loss of the sense of smell when they get older and that inability to smell could be a marker for The study sums up: “fatty acid olfactory sensitivity is clearly linked with fatty acid taste sensitivity albeit acting through. Causes and symptoms. Anosmia is the most common type of smelling disorder. Loss of the olfactory sense is generally caused by nasal congestion or obstruction. Temporary partial anosmia often occurs when a person has a cold, the flu, or some types of rhinitis, especially hay fever (allergic rhinitis).
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May 06, · The authors suggested that aging induced a loss of control on the OR expression in each olfactory sensory neuron (OSN), inducing the expression of multiple OR types per OSN, resulting in a loss of olfactory sensitivity in older subjects (Rawson et al.
Together with our results, these effects of aging would reduce the olfactory sensitivity more specifically to certain odorants as the Cited by: Jun 30, · Age-related loss of olfactory sensitivity: Association to dopamine transporter binding in putamen.
and age-related deficits in olfactory sensitivity was examined in 12 subjects ranging from 36 to 82 years of age. in marmosets produced a loss of olfactory sensitivity, which can be related to the degree of reduction in DA levels in Cited by: Olfactory Loss in Aging.
The gradual loss of olfactory responses in old age is probably at least in part due to the loss of central older subjects were less sensitive to Loss of olfactory sensitivity in older subjects. book molecules Author: Nancy Rawson.
Whereas cells from younger donors were highly selective in the odorants to which they responded, cells from older donors were more likely to respond to multiple odor stimuli, despite a loss in these subjects' absolute olfactory sensitivity, suggesting a loss of freelancerscomic.com by: Olfactory Loss and Regain: Lessons for Neuroplasticity.
OB demonstrates such high sensitivity to olfactory loss. Several recent studies conducted mostly in older subjects have demonstrated. Rawson and colleagues 27 found that it was just as likely to obtain functional olfactory neurons from the olfactory mucosa of older patients as from younger patients, suggesting that if there is a loss of olfactory neurons in older subjects it is distributed equally throughout the freelancerscomic.com by: Both sets contained a single molecule and a binary mixture.
Older subjects performed worse than young adults in an odor identification task, confirming a decline in the olfactory function. Feb 07, · Decreased olfactory function is very common in the older population, being present in over half of those between the ages of 65 and 80 years and in over three quarters of those over the age of 80 freelancerscomic.com by: Although the loss of human olfactory sensitivity is not usually a source of great concern, it can diminish the enjoyment of food and, if severe, can affect the ability to identify and respond appropriately to potentially dangerous odors such as spoiled food, smoke, or natural gas (see above).Cited by: 2.
Jul 14, · In addition, it is thought that age related olfactory dysfunction is related to an increase in receptor cell death. 2 Activation of the piriform/amygdalar region and the orbitofrontal cortex has been shown to be reduced in older subjects when exposed to stimulation.
6 In some cases, olfactory loss may be secondary to age related appositional Cited by: Apr 11, · This seems to be independent of the cause of olfactory loss. The deficit appears to improve with duration of the olfactory dysfunction, possibly indicating adaptive mechanisms. Further, the data suggest an age-related decrease of intranasal trigeminal sensitivity in healthy freelancerscomic.com by: However, despite the importance of sense of smell for nutrition and safety, the prevalence of olfactory impairment in older US adults has not been studied.
To determine the prevalence of olfactory. Repeated exposure to odors in healthy subjects has been shown to increase olfactory sensitivity (1)(2)(3) ; it also improves the recovery of patients with post-infectious olfactory loss (4,5) and. Thus, an age-dependent degradation of sensory input to the brain is one proposed mechanism for the loss of olfactory function in older populations.
Here, we tested this hypothesis by performing in vivo optical neurophysiology in 6- and month-old freelancerscomic.com: Marley D. Kass, Lindsey A. Czarnecki, John P. McGann. Jan 07, · Results. In recent years, simple and reliable tests of the sense of smell have been introduced in otorhinolaryngology.
Olfactory testing has become a new focus of attention in neurology as well, mainly because many patients with neurodegenerative diseases—including the majority of those with Parkinson’s or Alzheimer’s disease—have olfactory loss early on in the course of their freelancerscomic.com by: Jan 24, · Olfactory dysfunction is a common complaint among physician visits.
Olfactory loss affects quality of life and impairs function and activities of daily living. The purpose of our study was to assess the degree of odor identification associated with mental health. Olfactory function was measured using the brief smell identification freelancerscomic.com by: Also, patients with signs of depression (Croy and Hummel, ) and neurodegenerative diseases often exhibit and suffer from an olfactory loss (Doty et al., ; Haehner et al., ) and hence a loss of life quality.
This leads to the question, whether OT in older people may also modulate subjective well-being and cognitive freelancerscomic.com by: Olfactory nerves and fibers transmit information about odors from the peripheral olfactory system to the central olfactory system of the brain, which is separated from the epithelium by the cribriform plate of the ethmoid bone.
May 10, · “Olfactory sensitivity” was assessed across all conditions with scores varying between 1 (lowest sensitivity) and 16 (highest sensitivity) relating to the concentration steps of the sticks used.
Additionally, subjects were to judge the pleasantness and intensity (on a 9-point scale) of a stick containing n -butanol in a suprathreshold Cited by: Jul 23, · The median age of onset of the problems was 46, with a range from 0 to 83 (Figure 2 d).
Fifty-nine percent of the subjects had previously seen a doctor for their olfactory dysfunction (Additional file 2). A third to half of the subjects reported experiencing smell distortions in addition to smell loss (Figure 2 e).Cited by:.
Nov 13, · The age effects observed in the present study are supported by smaller-scale studies with convenience and laboratory samples. 8,9,22,23 Likewise, in a convenience sample, 80% of the participants aged 80 years or older showed olfactory impairment.
24 In the EHLS population, the prevalence of olfactory impairment was slightly lower among those 80 to 97 years of age (%); Cited by: In addition, the vast majority of subjects over the age of 80 exhibit reduced sensitivity and odor-identification ability on common olfactory tests (1, 8).
In contrast, a study with a prosimian primate (the gray mouse lemur) showed no decrement in olfactory function between young and old age groups (9).Oct 30, · 11 Kids’ Books on Dealing with Loss, Grief, Illness and Trauma.
The Children’s Book Review | October 30, When children experience serious illness, loss, grief or trauma, it’s crucial to allow them to express and cope with emotions while at the same time, helping them understand, as developmentally appropriate as possible, what is happening.