| Project/Area Number |
25463024
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Prosthodontics/ Dental materials science and
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| Research Institution | Tokyo Dental College |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
近藤 祥弘 東京歯科大学, 歯学部, 講師 (10162124)
武田 友孝 東京歯科大学, 歯学部, 准教授 (20236475)
石上 恵一 東京歯科大学, 歯学部, 特任教授 (70176171)
小澤 卓充 東京歯科大学, 歯学部, その他 (80637661)
酒谷 薫 日本大学, 工学部, 教授 (90244350)
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | ガム咀嚼 / 情動反応 / IADS / fNIRS / STAI / VAS / ストレス / 前頭前野 / ストループテスト / 認知機能 / 下顎偏位 / NIRS / 国際感情画像刺激 / 国際感情音響刺激 / 近赤外線イメージング装置 / 皮質活動 |
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| Outline of Final Research Achievements |
Many studies have investigated and suggested the effects of gum-chewing as a stress coping measure. However, the neurophysiological mechanisms involved are still unclear. The aim of this study was to investigate the hypothesis that gum-chewing activates the PFC in stress coping against negative sounds. Negative sounds were selected and mixed from the International Affective Digitized Sounds-2 (IADS) with fewer than 3.0 in pleasure value.
Gum-chewing activated the PFC activity while exposed to negative sounds from IADS as a mental stress task. Judged mainly by the psychological results, the subjects felt discomfort during NS, which could cause acute stress responses in the brain. Indeed, NS increased Oxy-Hb in the PFC, indicating that NS induced neural activation of the PFC.
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