Gundel A, Hilbig A
Int J Neurosci. 1983 Dec;22(1-2):125-33. doi: 10.3109/00207459308987391.
Circadian changes in frequencies and powers of the close-eyed EEG were measured over six days in 12 healthy volunteers living in a regular rest-activity cycle. EEGs were recorded every two hours and the probands were awakened for the recordings during the period of rest. Circadian rhythms occurred in powers and frequencies with diurnal amplitudes differing between individuals and locally on the scalp. Acrophases of peak frequencies and beta-power coincide with those of body temperature between 5 and 7 p.m., however, the crests of the diurnal rhythms in delta-, theta- and alpha-power varied more between individuals and covered systematically different times of the day. Acrophases of delta- and theta-powers occurred during the second half of the rest period and during the first half of the waking period. Only powers in the alpha-band showed locally different acrophases on the scalp. This could be observed in single individuals, too. In the central and parietal leads, acrophases of alpha-power were found during rest, whereas in the occipital leads of some probands acrophases occurred in the second half of the waking period.
在12名生活在规律休息 - 活动周期的健康志愿者中，对闭眼脑电图的频率和功率的昼夜变化进行了为期六天的测量。每两小时记录一次脑电图，并且在休息期间唤醒受试者进行记录。功率和频率出现昼夜节律，个体之间以及头皮局部的昼夜振幅有所不同。峰值频率和β功率的相位顶点与下午5点至7点之间的体温相位顶点一致，然而，δ、θ和α功率的昼夜节律波峰在个体之间变化更大，并且系统地覆盖了一天中不同的时间。δ和θ功率的相位顶点出现在休息期的后半段和清醒期的前半段。只有α波段的功率在头皮上显示出局部不同的相位顶点。这在个体中也可以观察到。在中央和顶叶导联中，α功率的相位顶点出现在休息期间，而在一些受试者的枕叶导联中，相位顶点出现在清醒期的后半段。
