Current perspectives on daytime sleepiness: the issues.
D000367:Age Factors; D001143:Arousal; D002940:Circadian Rhythm; D004569:Electroencephalography; D006801:Humans; D011930:Reaction Time; D011941:Receptors, Adrenergic / Q000502:physiology; D012890:Sleep / Q000502:physiology; D012894:Sleep Stages / Q000502:physiology
D011941:Receptors, Adrenergic