MelatoninSerotoninReceptors, MelatoninReceptor, Melatonin, MT1Receptor, Melatonin, MT2Serotonin Plasma Membrane Transport ProteinsReceptors, SerotoninReceptor, Serotonin, 5-HT2AReceptor, Serotonin, 5-HT1APineal GlandSerotonin Uptake InhibitorsSerotonin AntagonistsReceptor, Serotonin, 5-HT2CReceptor, Serotonin, 5-HT2BReceptors, Serotonin, 5-HT2Serotonin AgentsReceptor, Serotonin, 5-HT1BSerotonin Receptor AgonistsReceptors, Serotonin, 5-HT1TryptaminesSerotonin SyndromeSerotonin 5-HT2 Receptor AntagonistsCircadian RhythmArylalkylamine N-AcetyltransferaseAcetylserotonin O-MethyltransferaseReceptors, Serotonin, 5-HT3Tryptophan HydroxylaseSerotonin 5-HT2 Receptor AgonistsReceptors, Serotonin, 5-HT4Serotonin 5-HT1 Receptor AgonistsSerotonin 5-HT1 Receptor AntagonistsHydroxyindoleacetic AcidPhotoperiod5-HydroxytryptophanFluoxetineCitalopramSerotonergic NeuronsKetanserinRaphe NucleiFenclonineKynuramineLightParoxetine8-Hydroxy-2-(di-n-propylamino)tetralinMethysergide5-MethoxytryptamineReceptor, Serotonin, 5-HT1DSerotonin 5-HT3 Receptor AntagonistsAntioxidants5,7-DihydroxytryptamineRats, Sprague-DawleyDose-Response Relationship, DrugRats, WistarSleepBiogenic MonoaminesSleep Disorders, Circadian RhythmTryptophanBrainAntidepressive AgentsDopamineFluvoxamineDrug ImplantsCyproheptadineFenfluramineProlactinCinanserinAntidepressive Agents, Second-GenerationSeasonsPeriodicityBehavior, AnimalN-Methyl-3,4-methylenedioxyamphetamineTime FactorsArylamine N-AcetyltransferaseDarknessChronobiology DisordersFree Radical ScavengersSuprachiasmatic NucleusMembrane Transport ProteinsMonoamine OxidaseAmphetaminesAntidepressive Agents, Tricyclic