Sensory ThresholdsThermosensingSensationPain ThresholdTouchVibrationFecal IncontinencePeripheral Nervous System DiseasesPressureManometryElectric StimulationPain MeasurementPainHot TemperatureElectric Stimulation TherapyDifferential ThresholdPhysical StimulationStimulation, ChemicalAuditory ThresholdDeep Brain StimulationTranscranial Magnetic StimulationTime FactorsCells, CulturedAction PotentialsTranscutaneous Electric Nerve StimulationCatsPhotic StimulationAcoustic StimulationRats, Sprague-DawleyCalciumSignal TransductionElectrodes, ImplantedDose-Response Relationship, DrugMuscle ContractionNeuronsTaste ThresholdElectrophysiology