指先の使用による触覚能力の強化
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概要
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本研究の目的は、指先を使用することで触覚識別能力が高められることを証明することである。対象者は、一般学生８名、コンピュータ・クラブ学生１０名（タイピング時間が一日５時間以上）、盲学生５名である。最初に白杖が有する固有振動特性を調べた。次に静的２点識別、動的２点識別（２点間距離：２mm, ３mm, ５mm）および２点振動識別（２点間距離 : ２mm, ３mm, ５mm,接触子径 : ０５. mm, ０８. mm, １０. mm、振動数 : ３０Hz, １２５Hz, ２５０Hz）を用いて評価した。その結果、静的２点識別及び動的２点識別では、２点間距離が２mmにおいて、一般学生群の識別率は７５％であり、その他の２群の識別率は１００％であった。３mm, ５mmにおいて、識別率は全ての群において１００％であった。 ２点振動識別では、振動数３０Hzで３群間と接触子径間には交互作用がみられた（P＜００. ５）が、それぞれの要因に有意な差がみられた。１２５Hz、２５０Hzでは、接触子径および３群間に有意な差がみられた（P＜００. ５）。触覚識別能力は一般学生群、コンピュータ・クラブ学生群、盲学生群の順に高かった。以上より、２点振動に対する触覚識別能力は、指先をある目的に対して使用することにより高まる可能性を示唆した。The objective of this study is to verify that frequently using the fingertips results in a high ability level for tactile sensibility. The subject was 8 general students （a general student group）, 10 computer club students （PC student group ; composed of members who used their fingertips for five hours or more for a day）, and 5 blind school students （a blind school student group）. At first, we investigated the characteristics of vibrations from the long cane to evaluate vibrotactile sensibility. Next, a static two-point discrimination test, moving two-point discrimination test （the distance of two points : 2, 3, and 5mm）and two-point vibrotactile discrimination test （the distance of two points : 2, 3, and 5 mm, the diameters of contactor : 0.5, 0.8, and 1.0 mm, the dominant frequencies of long cane were 30, 125, and 250Hz）were used to evaluate vibrotactile sensibility. As a result, in the static two-point discrimination test and moving two-point discrimination test, when the distance of the two points was 2 mm, only two people in the general student group were not able to detect the two point's stimuli （75% . When the distance of the two points was 3 and 5 mm, all subjects were able to detect the two points' stimuli（100%）. In the distinction in the two-point vibrotactile discrimination test, when the dominant frequencies of long cane were 30Hz, there was an interaction between the three groups and the diameters of contactor （P＜0.05）. A significant difference was seen among the three groups and the diameters of contactor （P＜0.05）. At 125 and 250Hz, significant difference was seen among the three groups and the diameters of contactor （P＜0.05）. It was shown that the ability of tactile sensibility was high in order of a general student group, PC student group, and blind school student group. It seems reasonable to conclude that using the fingertip for a certain purpose more frequently enhances the discriminability of two-point vibration.
- 金沢大学つるま保健学会 = the Tsuruma Health Science Society, Kanazawa Universityの論文
金沢大学つるま保健学会 = the Tsuruma Health Science Society, Kanazawa University | 論文
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