| Project/Area Number |
23370104
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied anthropology
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| Research Institution | Chiba University |
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Principal Investigator |
KATSUURA Tetsuo 千葉大学, 工学(系)研究科(研究院), 教授 (00038986)
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| Co-Investigator(Kenkyū-buntansha) |
SHIMOMURA Yoshihiro 千葉大学, 大学院・工学研究科, 准教授 (60323432)
LEE Soomin 千葉大学, 環境健康フィールド科学センター, 助教 (90600429)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKAHASHI Yoshika 千葉大学, 大学院・工学研究科, 特任研究員 (20637186)
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| Research Collaborator |
NOZAKI Shoudai 千葉大学, 大学院・工学研究科, 大学院生
UCHIYAMA Yuria 千葉大学, 大学院・工学研究科, 大学院生
ISHIBASHI Shougo 千葉大学, 大学院・工学研究科, 大学院生
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2013: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2012: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2011: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
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| Keywords | 生理人類学 / 青色パルス光 / 非視覚的作用 / 発光ダイオード / 縮瞳 / 網膜電図 / 劣加法性 / 発光ダイオード(LED) / 単波長光 |
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| Research Abstract |
The purpose of this study was to clarify the non-visual effects of blue-pulsed light. We observed that the nonvisual effect pupillary constriction (miosis) occurred even during blue-pulsed light irradiation of very short pulse widths (0.5-2 us). When the product of irradiance intensity and the pulse width were equal, the condition of high irradiance and short pulse width was shown to produce marked miosis. The miosis during blue light exposure was stronger than that during simultaneous exposure to blue and green light, and the alpha attenuation coefficient of the EEG for blue light exposure was also greater than that during simultaneous exposure to blue and green light, despite the double irradiance intensity of the combination. We confirmed the subadditive response to pulsed light. Even when the photon density was same, the electroretinogram photopic negative response (PhNR) during the blue-pulsed light exposure was greater than those during the exposure to lights of other colors.
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