Sleep StagesSleepSleep, REMPolysomnographySleep DisordersWakefulnessElectroencephalographySleep Apnea SyndromesArousalSleep Apnea, ObstructiveElectrooculographyNocturnal Myoclonus SyndromeDelta RhythmCircadian RhythmSleep Initiation and Maintenance DisordersSleep Apnea, CentralSleep DeprivationSignal Processing, Computer-AssistedSupine PositionElectromyographyTime FactorsRespirationHeart RateAutonomic Nervous SystemBody TemperatureNonlinear DynamicsPostureSeverity of Illness IndexAnalysis of VarianceActigraphyElectrocardiographyBrainAction PotentialsReference ValuesBrain MappingOxygenDisorders of Excessive SomnolenceVideo RecordingSleep BruxismNeuronsSleep Disorders, IntrinsicReproducibility of Results