IleumPhysical ExaminationGuinea PigsIleal DiseasesMyenteric PlexusMuscle, SmoothIleitisIntestine, SmallIntestinal MucosaMuscle ContractionIleal NeoplasmsColonIntestinesIntestinal AbsorptionDuodenumNeurologic ExaminationGastrointestinal MotilityDiphenylacetic AcidsIleocecal ValveTomography, X-Ray ComputedTime FactorsGynecological ExaminationSensitivity and SpecificityEducational MeasurementSwineAtropineNutrition SurveysCecumProspective StudiesRabbitsPalpationMagnetic Resonance ImagingAcetylcholineFollow-Up StudiesFatal OutcomePeristalsisRetrospective StudiesIntestinal DiseasesGastrointestinal ContentsBiopsyReproducibility of ResultsCrohn DiseaseMicrovilliElectric Stimulation