Area PostremaSubfornical OrganCerebral VentriclesFourth VentricleSubcommissural OrganAllylglycineVoltage-Gated Sodium ChannelsThirstDrinkingParaventricular Hypothalamic NucleusProto-Oncogene Proteins c-fosBlood-Brain BarrierBrainWater-Electrolyte BalanceMedulla OblongataAngiotensin IIRats, Sprague-DawleySolitary NucleusEmeticsEstradiol AntagonistsBrain StemVomitingShrewsVagus NerveMethiothepinPressoreceptorsOncogene Proteins v-fosMicroinjectionsInjections, IntraventricularDenervationNeuromyelitis OpticaBlood Pressure