Medulla OblongataCerebellumPiloerectionBrain StemLateral Medullary SyndromeThermoreceptorsForamen MagnumBrainKidney MedullaProlactin-Releasing HormoneSpinal CordReticulumAutonomic PathwaysSolitary NucleusHypothalamusMagnetic Resonance ImagingRespirationReticular FormationNeuronsCatsChemoreceptor CellsVagus NerveBrain ChemistryRats, Inbred StrainsSudden Infant DeathRats, Sprague-DawleyGerminomaScrapiePressoreceptorsCatecholaminesImmunohistochemistryPonsProto-Oncogene Proteins c-fosBlood PressurePurkinje CellsNeural PathwaysNorepinephrineAneurysm, RupturedCentral Nervous SystemRats, WistarSympathetic Nervous SystemRats, Inbred WKYSerotoninTissue DistributionCarbon DioxideBrain NeoplasmsSheepRats, Inbred SHRHeart RateCerebellar CortexCerebellar DiseasesRNA, MessengerTime Factors