Hypoxia-Ischemia, BrainAnoxiaAnimals, NewbornBrain IschemiaIschemiaPlethysmography, Whole BodyHypoxia, BrainRats, Sprague-DawleyMyocardial IschemiaNeuroprotective AgentsIschemic Attack, TransientCell HypoxiaCerebrovascular CirculationPia MaterBrainReperfusionHypercapniaInfarction, Middle Cerebral ArteryReperfusion InjuryCerebral InfarctionDisease Models, AnimalHypotensionRats, WistarCell DeathNeuronsBrain EdemaTime FactorsCerebral ArteriesMyocardial Reperfusion InjuryCortical Spreading DepressionIschemic PreconditioningBrain InfarctionCerebral CortexGerbillinaeConstrictionLaser-Doppler FlowmetryWarm IschemiaOxygenHypothermia, InducedFocal AdhesionsMiddle Cerebral Artery