Suprathreshold Taste Intensities for Salt, Sucrose, Citric Acid, and Quinine HCl in Elderly Korean Women

한국인 여성에서 노화에 따른 초역치 미각강도의 변화

  • Yoon, Sang-Chul (Department of Oral Medicine, School of Dentistry Kyungpook National University) ;
  • Hur, Yun-Kyung (Department of Oral Medicine, School of Dentistry Kyungpook National University) ;
  • Choi, Jae-Kap (Department of Oral Medicine, School of Dentistry Kyungpook National University)
  • 윤상철 (경북대학교 치과대학 구강내과학교실) ;
  • 허윤경 (경북대학교 치과대학 구강내과학교실) ;
  • 최재갑 (경북대학교 치과대학 구강내과학교실)
  • Published : 2007.12.30

Abstract

The aim of this study was to measure the suprathreshold taste intensity for NaCl, sucrose, citric acid, and quinine HCl in elderly Korean women using a whole-mouth, sip-and-spit procedure, employing the method of magnitude matching. The results were analysed in terms of aging, menopause, and salivary flow rate. 31 elderly women (mean age; $50.8{\pm}5.1$ years) and 30 young women (mean age; $25.1{\pm}1.71$ years) were included for the study. Subjects were instructed to give nonmodulus magnitude estimates to the intensities of five concentrations each of sucrose, NaCl, citric acid, and quinine HCl; distilled water; 6 loudness level of a 1,000-Hz tone, using the same 9-point intensity scale. Each of the 21 taste stimuli and 6 auditory stimuli are presented in random order twice. The auditory function is used to assess the absolute intensity function of the subject's taste system. The results were as follows; 1. Comparing to young women, elderly women showed decreased taste intensities for lower concentration solutions of NaCl and sucrose. However, other solutions didn't show any difference in taste intensities between young and elderly women. 2. There were not significant difference in perceived taste intensities for NaCl, sucrose, citric acid, and quinine HCl between menopause and pre-menopause women in elderly women group. 3. There were not significant difference in perceived taste intensities for NaCl, sucrose, and quinine HCl between low salivation women and high salivation women in elderly women group. 4. The low salivation women in elderly group showed higher taste intensity for low concentration citric acid than high salivation women.

노화가 미각기능에 미치는 영향에 관해서는 아직도 많은 논란이 계속되고 있다. 노인에게서 보이는 미각기능의 감퇴를 정상적인 노화현상으로 보는 시각과 약물사용이나 타액분비의 감소에 의한 결과로 보는 시각이 교차하고 있으며, 또한 미각 기능을 평가하는 방법에 따라 서로 다른 주장이 제기되기도 하였다. 저자들은 노화가 초역치 미각강도에 미치는 영향을 구명하기 위해서 본 연구를 시행하였으며, 약물사용에 의한 영향을 배제하기 위해서 장기적인 약물사용의 병력이 없는 20대의 여성 30명과 40-50대의 여성 31명을 피검자로 선택하여 염화나트륨, 설탕, 구연산, 염산키니네 수용액에 대한 초역치 미각강도를 소리자극을 이용한 규모짝짓기 방법으로 측정한 다음 그 결과를 서로 비교하였으며, 40-50대 여성에 대해서는 또한 폐경의 여부와 타액분비량의 다과에 따른 차이를 비교하여 다음과 같은 결론을 얻었다. 1. 한국인 40-50대 여성은 20대 여성에 비해 저 농도의 염화나트륨 수용액과 저 농도의 설탕 수용액에 대한 초역치 미각강도가 감소되었으며, 고농도의 염화나트륨 수용액과 고농도의 설탕 수용액, 그리고 모든 농도의 구연산 수용액과 염산키니네 수용액에서는 차이가 없었다. 2. 한국인 40-50대 여성에서 폐경으로 인한 초역치 미각강도의 변화는 나타나지 않았다. 3. 한국인 40-50대 여성에서 타액분비량의 다과에 따른 초역치 미각강도의 변화가 염화나트륨 수용액, 설탕 수용액, 염산키니네 수용액에 대해서는 나타나지 않았다. 4. 한국인 40-50대 여성에서 타액분비량이 적은 군이 많은 군에 비해 저 농도의 구연산 수용액에 대한 초역치 미각강도가 높게 나타났다.

Keywords

References

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