MicroelectrodesElectrodesElectrodes, ImplantedDeep Brain StimulationStereotaxic TechniquesSubthalamic NucleusAction PotentialsElectrophysiologyGlobus PallidusMembrane PotentialsNeuronsElectric StimulationCatsParkinson DiseaseEvoked PotentialsPotassiumBrain MappingGuinea PigsMuscle, SmoothElectrochemical TechniquesIon-Selective ElectrodesSynaptic TransmissionElectrochemistryRats, Sprague-DawleyBiosensing TechniquesElectric ImpedanceEquipment DesignMicrotechnologyElectroencephalographyPatch-Clamp TechniquesElectric ConductivityConductometryPurkinje FibersNeurophysiologySignal Processing, Computer-AssistedTime FactorsAmplifiers, ElectronicImplantable NeurostimulatorsVisual ProsthesisElectrophysiological PhenomenaGoldEquipment Failure AnalysisCarbonPotentiometryEnzymes, ImmobilizedHeart Conduction SystemDogsNeural ProsthesesPapillary MusclesCalciumFluorocarbon PolymersIridiumGraphiteTetrodotoxinIontophoresisVideo RecordingElectronicsModels, NeurologicalPotassium ChannelsElectromyographyHydrogen-Ion ConcentrationNecturus maculosusArtificial OrgansChloridesSodiumRefractory Period, ElectrophysiologicalCerebral CortexMotor NeuronsNerve NetCochlear ImplantsNeural ConductionSynapsesHeartReaction TimeCochlear ImplantationNeural InhibitionExtracellular SpaceRabbitsResins, SyntheticNeurons, AfferentGlassEndocardiumSomatosensory CortexHippocampusPhysical StimulationCalibrationIon ExchangeEvoked Potentials, VisualVisual CortexRats, WistarExcitatory Postsynaptic PotentialsNeuromuscular JunctionTelemetryGlutamic AcidMuscle ContractionElectricityMovementWakefulnessAnti-Arrhythmia AgentsElectrocardiography