Parasympathetic Nervous SystemAutonomic Fibers, PreganglionicAutonomic Nervous SystemAtropineVagus NerveHeart RateSympathetic Nervous SystemMuscarinic AntagonistsHeartGanglia, AutonomicGanglia, SympatheticBlood PressureCentral Nervous SystemGanglia, ParasympatheticAutonomic Fibers, PostganglionicNervous SystemAdrenergic FibersNeuronsHexamethonium CompoundsSpinal CordAxonsCentral Nervous System DiseasesHypogastric PlexusDenervationPeripheral Nervous SystemCatsNeurons, EfferentElectric StimulationGangliaNictitating MembraneSynapsesStellate GanglionGanglionic BlockersHemicholinium 3Choline O-AcetyltransferaseHorseradish PeroxidasePentolinium TartrateEnteric Nervous SystemCentral Nervous System Neoplasms