Visceral PainVisceraVisceral AfferentsPainAbdominal PainPain ThresholdPain MeasurementPain ManagementPain PerceptionIrritable Bowel SyndromeHyperalgesiaNociceptive PainAnalgesicsNociceptionColonChronic PainReflex, AbdominalOrganotin CompoundsMustard PlantRectumAfferent PathwaysNociceptorsAcetic AcidDilatation, PathologicPain, PostoperativeSpinal CordAnalgesics, OpioidLow Back PainBack PainPhysical StimulationRats, Sprague-DawleyNeck PainPain, IntractableReceptors, Opioid, kappaMorphineElectroacupuncturePelvic PainPancreatitis, ChronicPosterior Horn CellsAnalgesics, Non-NarcoticInjections, SpinalFacial PainDisease Models, AnimalCatheterizationDilatationAcute PainPain, ReferredSumatriptanAcupuncture PointsCapsaicinLumbosacral RegionBehavior, AnimalSensationEsophagusProto-Oncogene Proteins c-fosShoulder PainMaternal DeprivationMusculoskeletal PainReceptor, PAR-2ColitisNarcotic AntagonistsNaloxoneNeurons, AfferentElectromyography