Hypoxia-Ischemia, BrainHypoxia, BrainAnoxiaHypercapniaHypotensionIschemiaBrain IschemiaCell HypoxiaCerebrovascular CirculationPia MaterBrainAnimals, NewbornNeuroprotective AgentsMyocardial IschemiaRats, Sprague-DawleyDisease Models, AnimalCell DeathRats, WistarCerebral ArteriesNeuronsReperfusion InjuryCerebral InfarctionOxygenFetal HypoxiaIschemic Attack, TransientInfarction, Middle Cerebral ArteryMyocardial Reperfusion InjuryHypoxia-Inducible Factor 1, alpha SubunitReperfusionMiddle Cerebral Artery