Subadditive responses of non-visual effect during exposure to blue pulsed light

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K14617
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Applied anthropology
• Research Institution: Chiba University
• Principal Investigator: KATSUURA Tetsuo 千葉大学, 大学院工学研究科, 名誉教授 (00038986)
• Research Collaborator: CHAVEZNAVA Carlos 千葉大学, 大学院工学研究科, 大学院生 ; KAKITSUBA Naoshi 名城大学, 理工学部, 教授 ; TAKEUCHI Tatsuya 名城大学, 理工学部, 学部生 ; MUTO Naoko 千葉大学, 工学部, 学部生
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 生理人類学 / 青色パルス光 / 非視覚作用 / 劣加法性 / 逐次照射 / 同時照射 / 照射間隔 / 瞳孔収縮

Outline of Final Research Achievements

We measured pupil constriction, electroencephalogram and subjective evaluation during exposure to extremely short pulses of light to examine a subadditive response on non-visual effect of light. Pupil constriction during simultaneous exposure to blue and green pulsed light was not inhibited as compared with that during exposure to blue pulsed light. However, the pupil constriction during exposure to pulsed light through a green-cut filter was more remarkable than during exposure to white pulsed light, which denotes subadditive response of light. Interestingly, we found the successive irradiation of blue and green pulsed light with irradiation intervals more than 500 ms induced pronounced pupil constriction.

Free Research Field

生理人類学