IleumGuinea PigsTime FactorsMyenteric PlexusMuscle, SmoothIleal DiseasesIleitisMuscle ContractionIntestine, SmallIntestinal MucosaIleal NeoplasmsGastrointestinal MotilityIntestinal AbsorptionColonIntestinesElectric StimulationDuodenumTreatment OutcomeAtropineDiphenylacetic AcidsIleocecal ValveAction PotentialsDose-Response Relationship, DrugSwineAcetylcholineProspective StudiesRabbitsPeristalsisSleepRetrospective StudiesCecumFollow-Up StudiesGastrointestinal ContentsVas DeferensCrohn DiseaseHexamethonium Compounds