Circadian RhythmSleep Disorders, Circadian RhythmSleep DisordersSleepSleep, REMParasomniasSleep Initiation and Maintenance DisordersSleep Disorders, IntrinsicNarcolepsyPolysomnographyChronobiology DisordersSuprachiasmatic NucleusSleep Apnea, ObstructiveMelatoninSleep Apnea SyndromesPeriod Circadian ProteinsJet Lag SyndromeNocturnal Myoclonus SyndromeCircadian Rhythm Signaling Peptides and ProteinsDisorders of Excessive SomnolenceBiological ClocksWakefulnessCircadian ClocksCLOCK ProteinsRestless Legs SyndromePhotoperiodARNTL Transcription FactorsPhototherapySomnambulismSleep StagesActivity CyclesLightDyssomniasDarknessElectroencephalographyQuestionnairesArousalBipolar DisorderCataplexyActigraphyREM Sleep Behavior DisorderMental DisordersCryptochromesSleep Medicine SpecialtySeverity of Illness IndexSleep BruxismTime FactorsBody TemperatureSnoringMotor ActivitySleep DeprivationBender-Gestalt TestMood DisordersHypersomnolence, IdiopathicFatiguePeriodicityAnxiety DisordersSleep Arousal DisordersHypnotics and SedativesDepressionNight TerrorsComorbidityPrevalenceElectrooculographyDepressive DisorderPineal GlandNuclear Receptor Subfamily 1, Group D, Member 1NeuropeptidesNocturiaRisk FactorsWork Schedule ToleranceAnalysis of VarianceCross-Sectional StudiesDiagnostic and Statistical Manual of Mental DisordersDreamsReceptors, MelatoninPsychiatric Status Rating ScalesTreatment OutcomeSleep ParalysisKleine-Levin SyndromeBruxismBrainCasein Kinase IepsilonHyperacusisQuality of LifeChronotherapyHabitsContinuous Positive Airway PressureLightingDepressive Disorder, MajorHydrocortisoneProspective StudiesOrexin ReceptorsChronobiology PhenomenaAge FactorsCase-Control StudiesElectromyographyBehavior, AnimalAttention Deficit Disorder with HyperactivityStress Disorders, Post-Traumatic