Stellate GanglionAutonomic Nerve BlockMepivacaineGanglia, SympatheticGanglia, AutonomicDecapodiformesGangliaGanglionectomyReflex Sympathetic DystrophySympathetic Nervous SystemRetinal Ganglion CellsGanglia, SpinalVagus NerveBasal GangliaAdrenergic FibersSympathectomyElectric StimulationSympathetic Fibers, PostganglionicAutonomic Fibers, PreganglionicHorner SyndromeDogsTrigeminal GanglionTachycardia, Ectopic AtrialTibial NerveNerve BlockHeartAutonomic Nervous SystemGanglia, ParasympatheticTachycardia, ParoxysmalGanglia, SensoryNorepinephrineAnesthetics, LocalBupivacaineNeuronsHeart Rate