Medulla OblongataPonsPiloerectionBrain StemLateral Medullary SyndromeThermoreceptorsForamen MagnumKidney MedullaProlactin-Releasing HormoneBrainSpinal CordReticulumAutonomic PathwaysSolitary NucleusRespirationHypothalamusReticular FormationCerebellumMagnetic Resonance ImagingCatsChemoreceptor CellsVagus NerveNeuronsSudden Infant DeathGerminomaRats, Inbred StrainsBrain ChemistryRats, Sprague-DawleyPressoreceptorsScrapieCatecholaminesProto-Oncogene Proteins c-fosBlood PressureImmunohistochemistryNorepinephrineAneurysm, RupturedNeural PathwaysSympathetic Nervous SystemCentral Nervous SystemRats, Inbred WKYRats, WistarSerotoninCarbon DioxideBrain NeoplasmsSheepRats, Inbred SHRHeart RateTissue DistributionTime FactorsRNA, Messenger