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PubMed1981

Taste thresholds of individuals with diabetes mellitus and of control subjects.

This study was designed to determine whether any difference in taste acuity exists between individuals with a diagnosis of Type I diabetes mellitus and control subjects. Detection and recognition thresholds were evaluated for sodium chloride, sucrose, citric acid, and quinine sulfate. The results indicate that diabetes or age can decrease an individual's ability to detect and recognize sweet, salty, and bitter solutions. Decreased taste acuity in individuals with diabetes may be an important factor in the perception of food.

Adolescent↗
PubMed1986

Absolute and intensity-difference taste thresholds in the rat: evaluation of an automated multi-channel gustometer.

An operant conditioning procedure is described for assessing taste detection and discrimination in rats. Rats were trained to lick at a 10-barrel stimulus delivery tube for a 0.005-ml sample of a positive (S+) or negative (S-) stimulus and to switch to a water delivery tube after presentation of S+. The system is computer controlled and selection of stimuli can be made interactive with performance. After preliminary training, absolute and intensity-difference thresholds can be determined in 1-2 sessions. Mean absolute thresholds in 10 rats for NaCl, sodium-saccharin, and sucrose were 0.0049%, 0.0012%, and 0.035%, respectively. Intensity-difference thresholds (not reported previously in the rat) for NaCl and saccharin were 16.1% and 12.3%, respectively. With these procedures rats also rapidly acquired 2-tastant discriminations, including those involving taste mixtures.

Animals↗
PubMed1995

[Whole mouth gustatory test (Part 2)--Effect of aging, gender and smoking on the taste threshold].

The whole mouth test method was employed for examining changes in gustatory senses due to aging. Participants were 314 male and 356 female healthy volunteers not complaining of taste disorders. Simultaneously, the effects of smoking were examined, comparing 71 male smokers to 142 male non-smokers, ranging from 20 to more than 60 years of age. A multiple comparison procedure (Tukey-Kramer) was applied to age groups, revealing a significant increase in the threshold with age; high threshold values were observed in the "70s and older" group in comparison to the younger group for all tastes other than the sweet taste. Concerning the differences between males and females, the gustatory thresholds of males were found to be higher than those of females for some in the "20s and older" group and for all tastes other than the sweet taste, whereas the thresholds of males were lower than those of females for all taste qualities in the late teen group. As to male subjects in whom the effects of smoking could be studied, smokers in their 20s demonstrated a slight rise in the threshold only for the bitter taste.

Adolescent↗