Circadian RhythmMelatoninReceptors, MelatoninReceptor, Melatonin, MT1Receptor, Melatonin, MT2Sleep Disorders, Circadian RhythmSuprachiasmatic NucleusPeriod Circadian ProteinsCircadian Rhythm Signaling Peptides and ProteinsPineal GlandCLOCK ProteinsPhotoperiodBiological ClocksCircadian ClocksARNTL Transcription FactorsChronobiology DisordersLightDarknessJet Lag SyndromeActivity CyclesArylalkylamine N-AcetyltransferaseCryptochromesSleepBody TemperaturePeriodicityMotor ActivityAcetylserotonin O-MethyltransferaseTryptaminesNuclear Receptor Subfamily 1, Group D, Member 1PhototherapyLightingChronobiology PhenomenaChronotherapyCasein Kinase IepsilonWakefulnessFlavoproteinsTime FactorsHydrocortisoneMesocricetusSeasonal Affective DisorderWork Schedule ToleranceBehavior, AnimalRod OpsinsDrug ChronotherapySalivaFeeding BehaviorPhodopusNuclear Receptor Subfamily 1, Group F, Member 1Gene Expression RegulationLight Signal TransductionSleep DeprivationSeasonsHeart RateOscillometrySleep StagesCorticosteroneDorsomedial Hypothalamic NucleusRats, WistarSleep DisordersDyssomniasGanglionectomyDrosophila ProteinsRNA, MessengerKynuramineTranscription FactorsOcular Physiological PhenomenaFeedback, PhysiologicalAntioxidantsBasic Helix-Loop-Helix Transcription FactorsNuclear ProteinsModels, BiologicalSynechococcusPhotoreceptor Cells, InvertebrateMice, Inbred C57BLAlpha RhythmSleep, REMNeuronsAtrial FibrillationRats, Sprague-DawleyNeuropeptidesTelemetryLuciferasesSolar ActivityEatingPhotoreceptor CellsSleep Initiation and Maintenance DisordersBody Temperature RegulationRetinaAerospace MedicineCasein Kinase IdeltaCricetinaeReproductionAnalysis of VarianceBrainNeurospora crassaHypothalamusSerotoninCentral Nervous System DepressantsArylamine N-AcetyltransferaseE-Box Elements