Hypoxia-Ischemia, BrainHypoxia, BrainBrain IschemiaBrainBrain InjuriesBrain Damage, ChronicAnimals, NewbornIschemiaAsphyxia NeonatorumAnoxiaNeuroprotective AgentsCell HypoxiaCerebral PalsyPia MaterInfant, PrematureHypercapniaInfant, NewbornBrain ChemistryCerebrovascular CirculationBrain DiseasesBrain EdemaRats, Sprague-DawleyHypotensionMyocardial IschemiaInfarction, Middle Cerebral ArteryDisease Models, AnimalRats, WistarNeuronsBrain InfarctionCell DeathBrain NeoplasmsIschemic Attack, TransientReperfusion InjuryBrain MappingCerebral InfarctionReperfusionBlood-Brain BarrierGerbillinaeCerebral CortexTime FactorsMagnetic Resonance ImagingOxygenBrain StemStrokeIschemic Preconditioning