Mice, Inbred ICRMotor ActivityBehavior, AnimalLocomotionDose-Response Relationship, DrugAntipruriticsPruritusCircadian RhythmAnimals, Outbred StrainsRodent DiseasesExploratory BehaviorBody WeightHyperkinesisInjections, IntraperitonealDisease Models, AnimalCocaineStereotyped BehaviorAmphetamineMethamphetamineMice, Inbred C57BLTime FactorsCentral Nervous System StimulantsDopamineBody TemperatureSarcoma 180Mice, Inbred StrainsOrgan SizeNucleus AccumbensDopamine Uptake Inhibitorsp-Methoxy-N-methylphenethylamineGlycolsBrainRats, Sprague-DawleyLethal Dose 50PregnancyMaze LearningActivity CyclesSpecies SpecificitySpecific Pathogen-Free OrganismsDrugs, Chinese HerbalAbnormalities, Drug-InducedSwimmingHaloperidolCarcinogensLiverTelemetryLampreysPlant ExtractsSuprachiasmatic NucleusAnimals, NewbornMaternal-Fetal ExchangeAnti-Anxiety AgentsEatingDopamine AntagonistsStartle ReactionPapillomaDopamine AgonistsSpleenCorpus StriatumMethylphenidateDextroamphetamineSelf AdministrationReceptors, Dopamine D2Analysis of VarianceDarknessHallucinogensInjections, IntraventricularApomorphineBiogenic MonoaminesAgingEmbryonic and Fetal DevelopmentRats, WistarAnxietyPeriod Circadian ProteinsMice, KnockoutConditioning, OperantSerotonin 5-HT2 Receptor AgonistsRNA, MessengerPhotoperiod