Sleep StagesSleepSleep, REMSleep DisordersPolysomnographyWakefulnessSleep Apnea SyndromesSleep Apnea, ObstructiveElectroencephalographyArousalNeoplasm StagingElectrooculographySleep Initiation and Maintenance DisordersNocturnal Myoclonus SyndromeSleep Apnea, CentralCircadian RhythmDelta RhythmSleep DeprivationSignal Processing, Computer-AssistedElectromyographySupine PositionTime FactorsActigraphyRespirationBody TemperatureDisorders of Excessive SomnolenceSleep BruxismAutonomic Nervous SystemSleep Disorders, IntrinsicSeverity of Illness IndexHeart RatePostureNonlinear DynamicsAnalysis of VarianceSleep Medicine SpecialtySleep Arousal DisordersSnoringNarcolepsySleep ParalysisReproducibility of ResultsDreamsREM Sleep Behavior DisorderReference ValuesEndosonographyLymphatic MetastasisBrainOxygenContinuous Positive Airway PressurePositron-Emission TomographyFluorodeoxyglucose F18PrognosisQuestionnairesElectrocardiographyTomography, X-Ray ComputedRadiopharmaceuticalsBrain MappingFatigueHypnotics and SedativesHabitsMelatoninProspective StudiesSensitivity and Specificity