Medulla OblongataIntercostal NervesCatsPiloerectionBrain StemLateral Medullary SyndromeThermoreceptorsForamen MagnumKidney MedullaProlactin-Releasing HormoneReticulumSpinal CordBrainAutonomic PathwaysSolitary NucleusHypothalamusRespirationReticular FormationCerebellumChemoreceptor CellsMagnetic Resonance ImagingVagus NerveSudden Infant DeathGerminomaNeuronsRats, Inbred StrainsPressoreceptorsScrapieCatecholaminesBrain ChemistryRats, Sprague-DawleyProto-Oncogene Proteins c-fosBlood PressureImmunohistochemistryAneurysm, RupturedNorepinephrineSympathetic Nervous SystemPonsRats, Inbred WKYCentral Nervous SystemNeural PathwaysSerotoninRats, WistarCarbon Dioxide