Esophageal Sphincter, LowerEsophageal Sphincter, UpperEsophagogastric JunctionManometryDeglutitionEsophagusSphincter of OddiPeristalsisPressureEsophageal AchalasiaGastroesophageal RefluxOpossumsDeglutition DisordersMuscle RelaxationAnal CanalEsophageal pH MonitoringEsophageal Motility DisordersEsophagitisPharyngeal MusclesCricoid CartilageMuscle ContractionMuscle, SmoothMuscle TonusPharynxEsophagoscopyEsophageal DiseasesFundoplicationLaryngeal MusclesFluoroscopyHernia, HiatalStomachDiverticulum, EsophagealGastrointestinal MotilityDidelphisSphincter of Oddi DysfunctionMotilinAtropineEsophagitis, PepticFecal IncontinenceEsophageal StenosisGastrinsUrinary Sphincter, ArtificialCatsCatheterizationEructationDilatationBethanecholAnti-Dyskinesia AgentsMethacholine CompoundsHexamethonium CompoundsUrethraPhentolamineHydrochloric AcidVagus NerveBarrett EsophagusReflexElectric StimulationEndoscopy, GastrointestinalPropranololSecretinCommon Bile Duct DiseasesIrisDogsVideo RecordingBaclofenUpper ExtremityHydrogen-Ion ConcentrationLaparoscopyAmpulla of VaterLacerationsAcetylcholineRectumAnus DiseasesUrodynamicsTreatment OutcomeFissure in AnoNitric Oxide