The alerting effects of caffeine, bright light and face washing after a short daytime nap
The alerting effects of caffeine, bright light and face washing after a short daytime nap
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DOI：
10.1016/s1388-2457(03)00255-4
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发表时间：
2003-12-01
影响因子：
4.7
通讯作者：
Hori, T
中科院分区：
文献类型：
--
作者：
Hayashi, M;Masuda, A;Hori, T
目的：本研究探讨白天小睡与咖啡因、强光和洗脸相结合是否能有效缓解午后困倦。方法：10 名年轻健康成年人参与 5 个实验条件；这些实验仅限于小睡：小睡 20 分钟；咖啡因+午睡：服用200毫克咖啡因，然后午睡；午睡+强光：午睡后立即暴露在2000 1x强光下1分钟；午睡+洗脸：午睡后立即洗脸； No-Nap：不睡觉就休息。这些小睡是在 12:40 进行的。受试者在午睡前 15 分钟和午睡后 1 小时从事计算机任务。结果：咖啡因 + 午睡对主观困倦和表现水平最有效；其效果在午睡后持续1小时。除性能水平外，午睡 + 亮光与咖啡因 + 午睡相当。午睡+洗脸的效果轻微且短暂，但在午睡后立即抑制了主观困倦。结论：通过摄入咖啡因、暴露在强光下或洗脸相结合，可以增强小睡对抗午后困倦的效果。意义：本研究将为防止午后困倦和困倦相关事故提供有效的对策。 (C) 2003 年国际临床神经生理学联合会。由爱思唯尔爱尔兰有限公司出版。保留所有权利。
Objective: The present study examined whether the combination of a short daytime nap with caffeine, bright light and face washing was effective against mid-afternoon sleepiness.Methods: Ten young healthy adults participated in 5 experimental conditions; those experiments were-Nap only: taking a 20 min nap; Caffeine + Nap: taking 200 mg of caffeine followed by a nap; Nap + Bright-light: being exposed to 2000 1x of bright light for 1 min immediately after napping; Nap + Face-washing: washing their faces immediately after napping; and No-Nap: taking a rest without sleep. These naps were taken at 12:40 hours. The subjects engaged in computer tasks for 15 min before napping and for 1 h after napping.Results: Caffeine + Nap was the most effective for subjective sleepiness and performance level; its effects lasted throughout 1 h after napping. Nap + Bright-light was comparable with Caffeine + Nap, except for performance level. Nap + Face-washing showed mild and transient effects, however, it suppressed subjective sleepiness immediately after napping.Conclusions: The effects of a short nap against mid-afternoon sleepiness could be enhanced by combining caffeine intake, exposure to bright light, or face washing.Significance: The present study would provide effective countermeasures against mid-afternoon sleepiness and sleepiness related accidents. (C) 2003 International Federation of Clinical Neurophysiology. Published by Elsevier Ireland Ltd. All rights reserved.