Fourth VentricleMedulla OblongataCerebral Ventricle NeoplasmsCerebral VentriclesPiloerectionThird VentricleHydrocephalusCerebral VentriculographyBrain StemDandy-Walker SyndromeCranial Fossa, PosteriorLateral Medullary SyndromeThermoreceptorsVentriculoperitoneal ShuntSyringomyeliaHeart VentriclesForamen MagnumBrainKidney MedullaMagnetic Resonance ImagingCerebellumProlactin-Releasing HormoneReticulumSpinal CordCisterna MagnaChoroid Plexus NeoplasmsLateral VentriclesCerebral AqueductSpina Bifida CysticaAutonomic PathwaysArnold-Chiari MalformationSolitary NucleusInjections, IntraventricularHypothalamusPlatybasiaNeuroendoscopyChoroid PlexusRespirationRats, Sprague-DawleyPonsGangliogliomaReticular FormationCerebellar DiseasesEpendymomaVagus NerveCatsChemoreceptor CellsCerebrospinal Fluid ShuntsInfratentorial NeoplasmsCholesteatomaCerebellar NeoplasmsRats, Inbred StrainsSudden Infant DeathNeuronsBrain NeoplasmsGerminomaPressoreceptorsBlood PressureRhombencephalonScrapieCatecholaminesBrain ChemistryArachnoid CystsProto-Oncogene Proteins c-fosCerebrospinal FluidImmunohistochemistryNorepinephrineSubarachnoid SpaceAneurysm, RupturedTime FactorsRats, WistarSympathetic Nervous SystemMeningiomaRats, Inbred WKYNeurocysticercosisTomography, X-Ray ComputedDilatation, PathologicCentral Nervous SystemHeart RateSerotoninNeural PathwaysRats, Inbred SHRSheepCarbon Dioxide