Maze LearningNeurogenesisHippocampusMemoryDentate GyrusBromodeoxyuridineWaterNeural Stem CellsNeuronsSpatial BehaviorBehavior, AnimalMemory DisordersSwimmingAdult Stem CellsCell ProliferationExploratory BehaviorNeuropeptidesMice, Inbred C57BLPhysical Conditioning, AnimalStem CellsFearAvoidance LearningFluoxetineAgingNestinLearningNeuronal PlasticityBrain-Derived Neurotrophic FactorCell CountConditioning (Psychology)Antidepressive AgentsMice, TransgenicAnalysis of VarianceMicrotubule-Associated ProteinsCell DifferentiationNerve Tissue ProteinsCognitionWater SupplyMethylazoxymethanol AcetateMotor ActivityRats, Sprague-DawleyDisease Models, AnimalAnxietyBrainRunningAntimetabolitesSpace PerceptionMice, KnockoutCell SurvivalReversal LearningAnimals, NewbornStress, PsychologicalDiscrimination LearningTime Factors