Pain ThresholdThoraxPainPain MeasurementSensory ThresholdsPain PerceptionTranscutaneous Electric Nerve StimulationPain ManagementHyperalgesiaChronic PainThermosensingPain, ReferredPain, PostoperativeAnalgesicsEar, ExternalDental Pulp TestAnalgesiaNociceptorsFibromyalgiaFacial PainPressureLow Back PainHot TemperaturePhysical StimulationNeck PainAcupuncture PointsAcupuncture AnalgesiaWristBack PainHypesthesiaMyofascial Pain SyndromesToothacheAnalgesics, OpioidSensationNociceptive PainNeuralgiaAbdominal PainAnalgesics, Non-NarcoticPain, IntractableDifferential ThresholdElectric Stimulation TherapyAuditory ThresholdPelvic PainAcupuncture TherapyHyperesthesiaElectroacupunctureSomatosensory DisordersElectric StimulationDouble-Blind Methodbeta-EndorphinAnalysis of VarianceAcute PainIrritable Bowel SyndromeCold TemperatureRadial NerveMorphineTemporomandibular Joint Dysfunction SyndromeSkin TemperatureTime FactorsVibrationWhiplash InjuriesLidocaineThoracic WallMigraine DisordersAnesthetics, LocalCross-Over StudiesShoulder PainChronic DiseaseMusculoskeletal PainSkin Physiological PhenomenaEvoked Potentials, SomatosensoryPerceptionRadiography, ThoracicTouchNAV1.7 Voltage-Gated Sodium ChannelReproducibility of ResultsSpinal CordPreanesthetic MedicationTomography, X-Ray ComputedSkinNAV1.8 Voltage-Gated Sodium ChannelInjections, SpinalSensation DisordersRats, Sprague-DawleyTreatment OutcomeRibsThoracic InjuriesBehavior, AnimalNAV1.9 Voltage-Gated Sodium ChannelPeriaqueductal GrayLasersAcetaminophenEndorphinsDiabetic NeuropathiesProspective StudiesNaloxoneQuestionnairesPeripheral NervesNerve FibersFlight, Animal