AgingRats, Inbred F344Age FactorsAnimals, NewbornRats, Inbred BNDisease Models, AnimalRats, WistarRats, Sprague-DawleyRats, Inbred StrainsBrainMice, Inbred C57BLOrgan SizeBody WeightNeuronsHippocampusTime FactorsMaze LearningSheepLiverRNA, MessengerCattleGuinea PigsAnalysis of VarianceNeuronal PlasticityMusclesMice, TransgenicSwineBehavior, AnimalImmunohistochemistryMuscle, SkeletalMicroscopy, ElectronBlotting, WesternRabbitsCells, CulturedEnzyme-Linked Immunosorbent AssayOxidative StressCell DivisionSex FactorsCross-Sectional StudiesQuestionnairesInfant, NewbornFollow-Up StudiesUnited States