Suprachiasmatic NucleusCircadian RhythmPeriod Circadian ProteinsBiological ClocksPhotoperiodARNTL Transcription FactorsCLOCK ProteinsCircadian ClocksMesocricetusDarknessLightChronobiology DisordersCryptochromesActivity CyclesCell NucleusVasoactive Intestinal PeptideGastrin-Releasing PeptideHypothalamusMotor ActivityPineal GlandNeuronsMelatoninReceptors, Vasoactive Intestinal Peptide, Type IIParaventricular Hypothalamic NucleusFlavoproteinsPeriodicitySupraoptic NucleusDorsomedial Hypothalamic NucleusReceptors, MelatoninNeuropeptidesCalbindinsCricetinaeNuclear ProteinsProto-Oncogene Proteins c-fosHypothalamus, AnteriorArginine VasopressinRod OpsinsGene Expression RegulationRats, Sprague-DawleyS100 Calcium Binding Protein GBehavior, AnimalCell Cycle ProteinsMice, Inbred C57BL8-Hydroxy-2-(di-n-propylamino)tetralinPhotoreceptor Cells, InvertebrateIn Situ HybridizationPhodopusMidline Thalamic NucleiVasopressinsMetergolineJet Lag SyndromeRaphe NucleiPreoptic AreaLight Signal TransductionBasic Helix-Loop-Helix Transcription FactorsRats, WistarRNA, MessengerPhotic StimulationOctodonGastrointestinal HormonesAction PotentialsArcuate NucleusMurinaeTranscription FactorsOptic NerveFetal Tissue TransplantationPituitary Adenylate Cyclase-Activating PolypeptideNeuroendocrinologyTime FactorsSerotonin Receptor AgonistsBicucullinePurinergic AgentsNeural PathwaysOptic ChiasmImmunohistochemistryGABA AntagonistsFeeding Behaviorgamma-Aminobutyric AcidBrain Tissue TransplantationNuclear Receptor Subfamily 1, Group D, Member 1Neuropeptide YOncogene Proteins v-fosPatch-Clamp TechniquesNucleus AccumbensBody TemperatureSerotoninReceptor, Melatonin, MT2LightingBrainMedian EminenceEye ProteinsTetrodotoxinVisual PathwaysOscillometryAutoreceptorsMice, TransgenicGlutamic AcidMice, KnockoutReceptors, Vasoactive Intestinal PeptideReceptors, Serotonin