Sleep-Wake Transition DisordersSleepWakefulnessSleep, REMSleep DisordersCircadian RhythmChronobiology DisordersPolysomnographySleep Disorders, Circadian RhythmActigraphySleep DeprivationSleep StagesArousalElectroencephalographySleep Initiation and Maintenance DisordersOrexin ReceptorsSleep Apnea, ObstructiveNarcolepsySleep Apnea SyndromesJet Lag SyndromeNight CareCataplexyReceptors, NeuropeptideNight BlindnessMelatoninElectromyographyNeuropeptidesWork Schedule ToleranceBody TemperatureBipolar DisorderMonitoring, AmbulatoryTime FactorsFatigueMental Disorders