Circadian RhythmSleep Disorders, Circadian RhythmSleep DisordersSleepSleep, REMParasomniasNarcolepsySleep Disorders, IntrinsicSleep Initiation and Maintenance DisordersPolysomnographyChronobiology DisordersSuprachiasmatic NucleusSleep Apnea, ObstructiveMelatoninSleep Apnea SyndromesPeriod Circadian ProteinsJet Lag SyndromeNocturnal Myoclonus SyndromeCircadian Rhythm Signaling Peptides and ProteinsDisorders of Excessive SomnolenceBiological ClocksCircadian ClocksWakefulnessCLOCK ProteinsRestless Legs SyndromePhotoperiodARNTL Transcription FactorsPhototherapySomnambulismSleep StagesLightActivity CyclesDyssomniasDarknessElectroencephalographyArousalCataplexyREM Sleep Behavior DisorderActigraphyBipolar DisorderCryptochromesSleep Medicine SpecialtySleep BruxismMental DisordersBody TemperatureSnoringSleep DeprivationMotor ActivityTime FactorsQuestionnairesBender-Gestalt TestHypersomnolence, IdiopathicMood DisordersPeriodicitySeverity of Illness IndexSleep Arousal DisordersHypnotics and SedativesNight TerrorsModels, BiologicalAnxiety DisordersPineal GlandElectrooculographyNuclear Receptor Subfamily 1, Group D, Member 1FatigueNeuropeptidesComorbidityNocturiaWork Schedule TolerancePrevalenceDepressive DisorderAnalysis of VarianceDreamsReceptors, MelatoninSleep ParalysisKleine-Levin SyndromeCasein Kinase IepsilonBrainBruxismRisk FactorsChronotherapyDiagnostic and Statistical Manual of Mental DisordersHyperacusisLightingHabitsChronobiology PhenomenaContinuous Positive Airway PressureOrexin ReceptorsCross-Sectional StudiesHydrocortisoneDepressionBehavior, AnimalElectromyographyCase-Control StudiesFlavoproteinsDepressive Disorder, MajorReceptor, Melatonin, MT2Gene Expression RegulationSecobarbitalAge FactorsTrazodone