Period Circadian ProteinsCLOCK ProteinsARNTL Transcription FactorsCircadian RhythmMotor ActivityLocomotionBehavior, AnimalExploratory BehaviorHyperkinesisCocaineStereotyped BehaviorAmphetamineMethamphetamineCentral Nervous System StimulantsDopamineBody TemperatureDose-Response Relationship, DrugNucleus AccumbensDopamine Uptake InhibitorsRats, Sprague-DawleyMaze LearningActivity CyclesSwimmingHaloperidolTelemetryLampreysSuprachiasmatic NucleusAnti-Anxiety AgentsDopamine AntagonistsStartle ReactionBrainEatingMice, Inbred C57BLDopamine AgonistsCorpus StriatumMethylphenidateDextroamphetamineSelf AdministrationReceptors, Dopamine D2Analysis of VarianceDarknessHallucinogensInjections, IntraventricularApomorphineBiogenic MonoaminesRats, WistarAnxietyConditioning, OperantSerotonin 5-HT2 Receptor AgonistsPhotoperiodSerotonin AntagonistsAvoidance LearningDrug InteractionsMice, KnockoutCheirogaleidaeFeeding BehaviorEthanolNeuropeptides