Cajochen, C Power density in theta/alpha frequencies of the waking EEG progressively increases during sustained wakefulness. [electronic resource] - Sleep Dec 1995 - 890-4 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 0161-8105 Standard No.: 10.1093/sleep/18.10.890 doi Subjects--Topical Terms: AdultAgedAlpha RhythmCircadian RhythmElectroencephalographyFatigueFemaleHumansMiddle AgedTheta RhythmWakefulness