title: [The EEG preferential frequency as an indicator of the degree of wakefulness].
abstract: Ever since electroencephalographic research began, interest has been focused on problems of the physiology, pathology, and symptomatology of the relationship between sleep and wakefulness. Following preliminaries, the present paper describes a combined procedure for the determination of the EEG preferential frequency, and by random sampling statistically examines its suitability for indicating the fluctuations of activation level as a control measure. A trained volunteer gradually increased his degree of wakefulness, reliably producing parallel changes in the preferential frequency in three frequency bands. A standardised manual period analysis as control produced largely the same results. The preferential frequency has considerable value for indicating the degree of wakefulness.
authors.affiliation: Zentralinstitut für Arbeitsmedizin der DDR, Berlin.
authors.forename: E
authors.initials: E
authors.lastname: Otto
authors.forename: P
authors.initials: P
authors.lastname: Gruner
mesh_terms: D000513:Alpha Rhythm; D001143:Arousal / Q000502:physiology; D001288:Attention / Q000502:physiology; D002540:Cerebral Cortex / Q000502:physiology*; D004569:Electroencephalography; D006801:Humans; D012815:Signal Processing, Computer-Assisted; D012894:Sleep Stages / Q000502:physiology; D013826:Theta Rhythm; D014851:Wakefulness / Q000502:physiology*
vernacular_title: Die EEG-Vorzugsfrequenz als Indikator des Wachheitsgrades.