2024-03-29T14:54:40Z
https://niigata-u.repo.nii.ac.jp/oai
oai:niigata-u.repo.nii.ac.jp:00025461
2022-12-15T03:55:24Z
432:1291:1292:1299
453:456
Age-related changes in thresholds of somatic sense of the tongue
加齢に伴う舌体性感覚閾値の変化
加齢に伴う舌体性感覚閾値の変化
櫻井, 晶
150086
田村, 裕
150087
山村, 千絵
150088
舌背中央部
体性感覚
触覚閾値
二点識別閾値
形状識別
Center of dorsal tongue
Somatic sense
Tactile sense threshold
Two-point discrimination thresholds
Shape discrimination
摂食・嚥下リハビリテーションの現場では,運動機能回復を目的としたリハビリテーションがほとんどで,感覚機能回復を目的としたものは少ない。また,加齢に伴う口腔体性感覚の変化について,定量的な評価を行った研究もほとんどない。本研究は,食塊形成や食物の物性,位置,形状などの認知に重要な役割を果たす舌背中央部の体性感覚の鋭敏度について,若年者と高齢者で比較することを目的として実施した。測定は触覚閾値,二点識別閾値水平方向・矢状方向,形状識別の三種類を行った。その結果,触覚閾値(若年群0.035±0.013g,高齢群0.141±0.091g(平均値±SD)),二点識別閾値(水平方向:若年群3.00±1.09mm,高齢群4.47±0.96mm,矢状方向:若年群5.83±1.52mm,高齢群7.04±1.96mm)は,ともに高齢群で有意に高かった。さらに形状識別正答率(若年群78.00±16.31%,高齢群58.24±13.39%(平均値±SD))は,高齢群で有意に低かった。本研究により,加齢に伴い舌背中央部の触覚,二点識別覚や形状識別覚は低下することがわかった。この原因として加齢による舌粘膜組織の生理的変化や感覚中枢をはじめとする中枢神経系の機能低下が関与していると考えられる。高齢者は一般に咀嚼や嚥下において不利な条件下にあることが示唆される。
Most of the rehabilitation programs of eating and swallowing functions aim at motor function recovery. In contrast, only a few attempts have been made to improve sensory function. For this, few quantitative studies have been made to evaluate age-related changes in oral somatic sense. In the present study, comparison of somatic sense of center of the dorsal tongue, which plays an important role in the bolus formation and recognition of properties, position and shape of food, was made between young people and elderly people. We performed that 1) Measurement of tactile sense threshold 2) Measurement of two-point discrimination thresholds 3) Discrimination of two different shapes, one was circular, and the other was square. The result was as follows; 1)The tactile sense threshold in elderly people (0.141±0.091g) was significantly higher than that in young people (0.035±0.013g). 2) The two-point discrimination thresholds of elderly people (horizontal 4.47±0.96mm, sagittal 7.04±1.96mm) were significantly higher than those of young people (horizontal 3.00 ± 1.09mm, sagittal 5.83±1.52mm). Moreover, regardless of age, the thresholds measured in a horizontal direction were lower than those of sagittal direction. 3) The ratio of correct answer in elderly people (58.24±13.39%) was significantly lower than that of young people (78.00±16.31%). These results indicate that somatic sense and shape discrimination ability decreased with aging. Such phenomena may partly be due to the physiological change of the lingual mucosa and the depression of the central nervous system by aging. It is supposed that elderly people are generally disadvantageous to eating and swallowing.
departmental bulletin paper
新潟歯学会
2009-12
application/pdf
新潟歯学会雑誌
2
39
143
151
新潟歯学会雑誌
AN0018300X
03850153
https://niigata-u.repo.nii.ac.jp/record/25461/files/NS_39(2)_143-151.pdf
jpn