SleepCircadian RhythmSleep, REMSleep DisordersSleep Apnea, ObstructiveSleep Initiation and Maintenance DisordersSleep Apnea SyndromesPolysomnographyWakefulnessElectroencephalographyPeriodicityBiological ClocksActigraphySuprachiasmatic NucleusActivity CyclesArousalPeriod Circadian ProteinsSleep Apnea, CentralDisorders of Excessive SomnolencePhotoperiodDelta RhythmSleep Disorders, IntrinsicCircadian Rhythm Signaling Peptides and ProteinsSleep BruxismCircadian ClocksAlpha RhythmSleep Disorders, Circadian RhythmElectrooculographyTime FactorsCLOCK ProteinsChronobiology DisordersAtrial FibrillationSleep Medicine SpecialtySleep Arousal DisordersNarcolepsySnoringBody TemperatureARNTL Transcription FactorsDarknessSleep ParalysisDreamsREM Sleep Behavior DisorderElectromyographyLightMotor ActivityNocturnal Myoclonus SyndromeContinuous Positive Airway PressureJet Lag SyndromeRespirationElectrocardiographyQuestionnairesElectric CountershockFatigueAnalysis of VarianceHabitsHypnotics and SedativesSeverity of Illness IndexMelatoninBeta RhythmCryptochromesRespiratory MechanicsAnti-Arrhythmia AgentsBehavior, AnimalNeuronsCataplexyPonsArrhythmias, CardiacSignal Processing, Computer-AssistedRestless Legs SyndromeBrainNeuropeptidesHydrocortisoneHeart RateTreatment OutcomeChronobiology PhenomenaHomeostasisCatheter AblationSleep Phase ChronotherapyProspective StudiesHeart Conduction SystemRisk FactorsCross-Sectional StudiesNerve NetAccelerated Idioventricular RhythmHeart AtriaFeeding BehaviorOscillometryAction PotentialsLightingMandibular AdvancementAge FactorsSomnambulismAdenoidectomyAzabicyclo CompoundsRats, Sprague-DawleyCardiac Pacing, ArtificialLocomotionComorbidityCross-Over StudiesPsychomotor Performance