Sleep-Wake Transition DisordersElectroencephalographySleepWakefulnessSleep, REMSleep DisordersChronobiology DisordersCircadian RhythmPolysomnographySleep Disorders, Circadian RhythmSleep StagesActigraphyArousalSleep DeprivationBrain WavesSleep Initiation and Maintenance DisordersOrexin ReceptorsEpilepsyEpilepsies, PartialDelta RhythmBrainMagnetoencephalographyAlpha RhythmNarcolepsyElectromyographySeizuresSleep Apnea, ObstructiveSignal Processing, Computer-AssistedSleep Apnea SyndromesBrain MappingReceptors, NeuropeptideCataplexyJet Lag SyndromeElectrooculographyTime FactorsMagnetic Resonance ImagingCerebral CortexNeuropeptidesBipolar DisorderEvoked PotentialsMelatoninHypnotics and SedativesBody TemperatureMonitoring, AmbulatoryBeta RhythmBiological ClocksMental DisordersCortical SynchronizationEvoked Potentials, Visual