Lavie P, Weler B
Sleep Laboratory, Faculty of Medicine, Technion - Israel Institute of Technology, Haifa.
Electroencephalogr Clin Neurophysiol. 1989 Mar;72(3):218-24. doi: 10.1016/0013-4694(89)90246-0.
The present study investigated the effects of timing of naps on nap content and sleep inertia, and the relationship between pre- and post-nap sleepiness level and nap content. Nine subjects were tested twice on the 13 min waking-7 min resisting sleep paradigm after one night of total sleep deprivation for 24 h. The ultrashort sleep-wake paradigms started at 07.00 h and were interrupted at 15.00 and 19.00 h for 2 h naps. The 2 experimental conditions were counterbalanced across subjects and separated by a 7 day rest period. The results showed that the early nap was significantly more efficient, contained more stage 3/4, and produced less sleep inertia than the late nap. The late nap was more efficient in reducing sleepiness during the last 5 h of the experiments (23.00-04.00). Only the early nap was significantly related to pre- and post-nap sleepiness levels. Overall sleepiness level and the timing of the nocturnal sleepiness gates were significantly correlated between the two parts of the study. The results were interpreted to support the priority of the ultradian phase on prior wakefulness with respect to sleep structure.
本研究调查了午睡时间对午睡内容和睡眠惰性的影响，以及午睡前后嗜睡水平与午睡内容之间的关系。9名受试者在经历24小时的整夜睡眠剥夺后，在13分钟清醒-7分钟抗睡眠范式下接受了两次测试。超短睡眠-觉醒范式于07:00开始，并在15:00和19:00中断2小时进行午睡。这两种实验条件在受试者之间进行了平衡，并间隔7天休息期。结果表明，与晚午睡相比，早午睡效率显著更高，包含更多的3/4期睡眠，且产生的睡眠惰性更小。晚午睡在实验的最后5小时（23:00-04:00）降低嗜睡方面更有效。只有早午睡与午睡前后的嗜睡水平显著相关。总体嗜睡水平和夜间嗜睡阈值的时间在研究的两个部分之间显著相关。结果被解释为支持超日节律阶段相对于睡眠结构在先前觉醒方面的优先性。
