Topological electrogustometry and chemogustometry surrogate markers of
age-related gustatory decline in humans
Abstract
Objectives: The primary goal was to evaluate the effect of
stimulus-duration on Electrogustometry (EGM) Thrasholds, to evaluate any
gender-related influences and compare the above results to those after
application of Taste-Strips. Design: Electrogustometry (EGM) thresholds
of various stimulus duration (0.5, 1.0, 1.5, and 2.0 s) were measured in
212 non-smokers (age range: 10 – 80 years, divided into 8 age groups)
without self-reported gustatory impairment. Furthermore, taste strips
chemogustometry measurements in 132 participants were performed.
Setting: Tertiary referral medical centre. Participants: 212
non-smokers, divided in 8 age-groups participated in the study. Main
outcome measures: EGM-Thresholds and taste-strips, duration of stimuli
Results: EGM-thresholds increased progressively with age and with
increase in stimulus duration from 0.5 sec up to 2 sec. This pattern was
consistent at all 6 anatomic areas, irrespective from gender. In
contrast, in chemogustometry no differences related either to age or to
gender were found. Conclusions: Age-related electrophysiological and
functional gustatory decline can be better documented by EGM than using
chemogustometry. This superiority of EGM was not influenced by stimulus
duration; nonetheless, stimulus duration should be clearly documented in
future quantitative EGM-threshold recordings, given that it may
significantly influence EGM amplitude threshold measurements.