title: A case study of temporal change in EEG alpha activity in a multiple sleep latency test.
abstract: The appearance of electroencephalogram (EEG) alpha activity in a multiple sleep latency test was quantitatively analysed using percentage time alpha. Two components were extracted from the temporal change in smoothed percentage time alpha: a general level showing a progressive decrease and a cyclic variation with a mean interval of 39.8 s. The cyclic variation of percentage time alpha was evident during the period of the general level below 50%. The arousal cycle in the drowsy state is discussed.
authors.affiliation: Department of Psychology, Faculty of Education and Regional Sciences, Tottori University, Tottori city, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Hirano
authors.forename: Y
authors.initials: Y
authors.lastname: Hiroshige
mesh_terms: D000328:Adult; D000513:Alpha Rhythm; D001143:Arousal / Q000502:physiology; D002540:Cerebral Cortex / Q000502:physiology; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D017286:Polysomnography; D011930:Reaction Time / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology*