MicroinjectionsMedulla OblongataPonsSolitary NucleusMuscimolBradycardiaGABA AgonistsUrocortinsSplanchnic NervesDecerebrate StateBicucullineReticular FormationVagotomyParaventricular Hypothalamic NucleusRaphe NucleiRats, Sprague-DawleyPeriaqueductal GraySleep, REMSympathetic Nervous SystemRats, WistarNucleus AccumbensGlutamic AcidPhrenic NerveHeart RateTegmentum MesencephaliKynurenic AcidGABA AntagonistsOncogene Proteins v-fosDrug Administration RoutesBehavior, AnimalCatsReceptors, Corticotropin-Releasing HormoneCholinergic AgonistsAmphibian ProteinsBlood PressureBaroreflexVagus NerveIbotenic AcidRespiratory RateBrain StemMuscle TonusStereotaxic TechniquesCholinergic FibersBaclofenExcitatory Amino Acid AgonistsDose-Response Relationship, DrugHypoglossal NerveExcitatory Amino Acid AntagonistsCardiovascular SystemVentral Tegmental AreaWakefulnessLidocaineGABA-A Receptor Antagonists8-Hydroxy-2-(di-n-propylamino)tetralinReflexNeuronsTrigeminal NucleiArterial PressureNeural PathwaysInjections, IntraventricularCarbacholEnkephalin, Ala(2)-MePhe(4)-Gly(5)-Corticotropin-Releasing HormoneHypothalamusAdrenergic FibersAmygdalaSerotonin Receptor AgonistsDopamine AntagonistsSympathomimeticsPreoptic AreaReceptors, GlutamateMesencephalonCocainegamma-Aminobutyric AcidSerotonin AntagonistsConditioning, OperantElectromyographyConditioning, ClassicalArcuate NucleusMotor ActivityMorphineGlobus PallidusSelf AdministrationAniline CompoundsReceptors, OpioidReceptors, SerotoninRespirationElectric StimulationDyskinesia, Drug-InducedN-MethylaspartateAnalysis of VarianceNeuropeptidesChemoreceptor CellsInjectionsFearElectroshockReinforcement (Psychology)Peptide HormonesKainic AcidDopamine Agonists