Kohsaka M, Fukuda N, Honma H, Kobayashi R, Sakakibara S, Koyama E, Nakano T, Matsubara H
Sapporo Hanazono Hospital, Japan.
Psychiatry Clin Neurosci. 1999 Apr;53(2):239-41. doi: 10.1046/j.1440-1819.1999.00539.x.
Eight healthy elderly women aged 56-72 years (mean age: 67.4 years) participated in this study. They were exposed to moderately bright light (1000 lux) for 1h in the morning every 6 days in their homes. Moderately bright light improved self evaluations for alertness, mood, motivation, happiness, refreshment, concentration and appetite after the second exposure to the light. Sleep maintenance, anxiety and integrated sleep feeling also improved after the fourth exposure to the light. The phase of rectal temperature rhythm did not change in a moderately bright light condition. These results suggest that bright light influences sleep quality and self evaluations without changing the biological rhythm phase.
8名年龄在56至72岁之间（平均年龄：67.4岁）的健康老年女性参与了本研究。她们每隔6天在家中于早晨接受1小时中等强度明亮光线（1000勒克斯）照射。在第二次接受光照后，中等强度明亮光线改善了对警觉性、情绪、动力、幸福感、清爽感、注意力和食欲的自我评价。在第四次接受光照后，睡眠维持、焦虑和整体睡眠感受也得到了改善。在中等强度明亮光线条件下，直肠温度节律的相位没有变化。这些结果表明，明亮光线在不改变生物节律相位的情况下影响睡眠质量和自我评价。
