著者

野口 公喜

出版者

一般社団法人照明学会

雑誌

照明学会誌 (ISSN:00192341)

巻号頁・発行日

vol.93, no.3, pp.134-137, 2009-03-01

被引用文献数

2

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Melatonin is considered to be an important hormone for sound sleep and circadian regulation. It had firstly been found to be suppressed by high intensity light (2500lx) about 30 years ago then recent studies suggested it could be suppressed by household indoor lighting as well. In this report, a lower color temperature fluorescent lighting (2300K) than general products is introduced based on recently discovered action spectrum. It was proved to have less impact on melatonin secretion than 3000K and 5000K under same illuminance condition. Considering wavelength constitution will be more important in next generation lighting represented by LED.

著者

野口 公喜 白川 修一郎 駒田 陽子 小山 恵美 阪口 敏彦

出版者

一般社団法人照明学会

雑誌

照明学会誌 (ISSN:00192341)

巻号頁・発行日

vol.85, no.5, pp.315-322, 2001-05-01

被引用文献数

6

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The effects of simulating dawn lighting with an ordinary ceiling light on the quality of awakening were investigated. The subjects were healthy men, aged 24-27. After sleep for about 7 hours with polysomnographic recordings in a climatic chamber kept at a temperature of 25℃ and a relative humidity of 50%, each subject was awakened by an alarm. For the 30 minutes immediately before the subject was awakened, the illumination in the chamber was gradually increased, simulating the condition of waking up as the sun rises. Alpha attenuation test, measuring blood pressure and awakening feelings were conducted after awakening. The time of sleep stage 2 appearing during the 30 minute simulating dawn lighting was significantly less (p < 0.05; Wilcoxon test) than during typical waking conditions (i.e., waking up in the dark), while the time of stage W was higher (p = 0.0796). The mood after awakening in the simulating dawn lighting condition was significantly better (p < 0.05). There were no significant differences in the alpha attenuation coefficients and blood pressures after awakening between the two conditions. These results suggest that simulating dawn lighting arouses subjects to light sleep, which makes awakening less sudden and more pleasant. There was no evidence that the light sleep immediately before awakening decreased the subjects' cerebral cortex activity or sympathetic nervous activity after awakening.

著者

山田 佐知 明石 行生 安倍 博 野口 公喜 新井 奈津美 角田 麻衣 渡邊 嘉朗 飯郷 雅之

出版者

一般社団法人 照明学会

雑誌

照明学会 全国大会講演論文集 平成21年度(第42回)照明学会 全国大会講演論文集

巻号頁・発行日

pp.66, 2009 (Released:2010-01-08)

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睡眠障害を含む生体リズム障害の治療法としては,早朝に高照度(≧2500 lx)の白色光を浴びる,光療法が有効とされている.一方,1日を周期に持つ概日リズムに深く関連するメラトニン分泌を,低照度の青色光が抑制する効果が発見された.このことから本研究は,早朝の低照度青色光照射で,日中の覚醒と夜間の良質な睡眠を促し,生体リズム障害を予防・緩和することを目指し,青色光の覚醒と概日リズムへの影響を検証する実験を行った. 光照射実験には,白色照明(蛍光灯)と青色LEDを内蔵する照明器具を使用した.照明条件は,白色照明のみと,それに青色照明を加えた条件の2条件とした.各条件で1週間に1条件,2日間連続して実験を行った.光照射は8:45~10:15とし,1日を通した被験者のコルチゾール濃度,体温,眠気申告,活動量の測定を行い,概日リズムと覚醒度を評価した. 実験結果から,青色照明下の方が白色照明下より授業中の覚醒度が向上し,青色光の日中の覚醒の持続も確認できた.また,青色照明を照射した日の方が夜間活動量を低下させた.このことから,青色光が日中の覚醒と活動量を向上,夜間の活動量を低下させ,メリハリのある睡眠・覚醒リズム形成を促すことが明らかになった.

著者

野口 公喜 白川 修一郎 駒田 陽子 小山 恵美 阪口 敏彦

出版者

一般社団法人 照明学会

雑誌

照明学会誌 (ISSN:00192341)

巻号頁・発行日

vol.85, no.5, pp.315-322, 2001-05-01 (Released:2011-07-19)

参考文献数

25

被引用文献数

2 2

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The effects of simulating dawn lighting with an ordinary ceiling light on the quality of awakening were investigated. The subjects were healthy men, aged 24-27. After sleep for about 7 hours with polysomnographic recordings in a climatic chamber kept at a temperature of 25t and a relative humidity of 50%, each subject was awakened by an alarm. For the 30 minutes immediately before the subject was awakened, the illumination in the chamber was gradually increased, simulating the condition of waking up as the sun rises. Alpha attenuation test, measuring blood pressure and awakening feelings were conducted after awakening.The time of sleep stage 2 appearing during the 30-minute simulating dawn lighting was significantly less (p<0.05; Wilcoxon test) than during typical waking conditions (i. e., waking up in the dark), while the time of stage W was higher (p=0.0796). The mood after awakening in the simulatig dawn lighting condition was significantly better (p<0.05). There were no significant differences in the alpha attenuation coefficients and blood pressures after awakening between the two conditions.These results suggest that simulating dawn lighting arouses subjects to light sleep, which makes awakening less sudden and more pleasant. There was no evidence that the light sleep immediately before awakening decreased the subjects' cerebral cortex activity or sympathetic nervous activity after awakening.

著者

秋月 有紀 野口 公喜 阪口 敏彦

出版者

一般社団法人照明学会

雑誌

照明学会全国大会講演論文集 (ISSN:09191895)

巻号頁・発行日

vol.29, 1996-08-31

著者

井上 学 野口 公喜 戴 倩穎 下村 義弘 岩永 光一 勝浦 哲夫

出版者

The Illuminating Engineering Institute of Japan

雑誌

照明学会 全国大会講演論文集

巻号頁・発行日

pp.113, 2002 (Released:2003-07-17)

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前回の実験により, 被験者の主観的選択から求められたオフィス照明の最適な色温度は自然光に近似した変化を示すことが分かった. 今回は, 求められた色温度変動カーブによるアンビエント照明の制御と一般的な5000K一定の照明要件とを比較して心理·生理的影響の違いを評価した. 机上面照度はいずれも900lx一定とした. 実験は, 調色可能な照明器具が天井に埋設された無窓の部屋を使用した. 実験測定時間は07:30∼12:30及び13:30∼17:30の合計9時間とし, 主観評価, 生理データ(脳波, 心拍変動, 血圧等)を測定した. その結果, 自然光の色温度変化に近似した色温度変動照明要件は一般的な5000K一定の照明要件と比較し, 疲労感や眠気, 精神的な緊張の軽減をもたらす効果のあることが示唆された.