PeristalsisIleusEsophagusManometryGastrointestinal MotilityIntestinal ObstructionDeglutitionIntestinal Pseudo-ObstructionMeconiumEsophageal Motility DisordersEsophageal Sphincter, LowerUreterPressureIleumEsophageal AchalasiaMuscle, SmoothEsophagogastric JunctionIntestine, SmallMuscle ContractionCineradiographyAirIleal DiseasesGuinea PigsRespiratory System AbnormalitiesGastrointestinal TransitReflex, AbdominalKidney PelvisEnteric Nervous SystemGallstonesDeglutition DisordersUrinary Tract Physiological PhenomenaSenna ExtractGastroesophageal RefluxMethysergideScopolamine HydrobromideGastric EmptyingColonAtropineCatenanesJejunal DiseasesEsophageal Sphincter, UpperPostoperative ComplicationsPharynxDigestive System Physiological PhenomenaHernia, HiatalPurinergic AntagonistsFundoplicationSubmucous PlexusApaminLaparotomyLaryngeal NervesEsophageal DiseasesReflexLaparoscopyDigestive System Surgical ProceduresBornanesBarium SulfateOpossums