Dijk D J, Beersma D G, Bloem G M
Department of Biological Psychiatry, University of Groningen, The Netherlands.
Sleep. 1989 Dec;12(6):500-7. doi: 10.1093/sleep/12.6.500.
Baseline sleep of 13 men (mean age of 23.5 years) and 15 women (21.9 years) was analyzed. Visual scoring of the electroencephalograms (EEGs) revealed no significant differences between the sexes in the amounts of slow-wave sleep and rapid-eye-movement (REM) sleep. Spectral analysis, however, detected significantly higher power densities during non-REM sleep over a wide frequency range (0.25-11.0 Hz) in the female versus male subjects. Also, during REM sleep, power densities were higher in the females. Analysis of the time course of EEG power density during sleep revealed that the differences between males and females persisted throughout the sleep episode. Comparison of these differences with published data on the effects of sleep deprivation on EEG power spectra did not suggest a common mechanism underlying sleep deprivation effects and the sex difference in sleep EEGs. It is concluded that sex differences in EEG power spectra are not likely to be caused by sex differences in sleep regulatory mechanisms but may, for instance, be caused by sex differences in skull characteristics.
对13名男性（平均年龄23.5岁）和15名女性（21.9岁）的基础睡眠进行了分析。脑电图（EEG）的视觉评分显示，男女在慢波睡眠和快速眼动（REM）睡眠量上没有显著差异。然而，频谱分析检测到，在非快速眼动睡眠期间，女性受试者在较宽频率范围（0.25 - 11.0赫兹）内的功率密度显著高于男性受试者。此外，在快速眼动睡眠期间，女性的功率密度也更高。对睡眠期间脑电图功率密度的时间进程分析表明，男女之间的差异在整个睡眠过程中持续存在。将这些差异与已发表的关于睡眠剥夺对脑电图功率谱影响的数据进行比较，并未表明睡眠剥夺效应和睡眠脑电图性别差异存在共同的潜在机制。结论是，脑电图功率谱的性别差异不太可能由睡眠调节机制的性别差异引起，而可能例如由颅骨特征的性别差异引起。
