著者

落合 将太郎 原田 和樹 李 相逸 樋口 重和

出版者

日本生理人類学会

雑誌

日本生理人類学会誌 (ISSN:13423215)

巻号頁・発行日

vol.22, no.2, pp.69-76, 2017 (Released:2017-10-31)

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The aim of the present study was to determine the measurement dependence of the effects of color light and to clarify the correlation between physiological responses and subjective impression. Seventeen male university students without color vision deficiency were exposed to blue light and red light (200 lx at eye level) at night for three hours. The effects of blue light on pupil constriction and melatonin suppression were significantly greater than the effects of red light. On the other hand, heart rate tended to be higher under the red light condition. There was no significant difference between the effects of blue light and red light on rectal temperature or alertness. Individual variations in the subjective impression of light were correlated with heart rate and rectal temperature but not with melatonin concentration or pupil constriction. The results suggest that the physiological effects of light depend on measurements and that these variations may be influenced by subjective impression.