title: Propulsion and retropulsion of normal colonic contents.
mesh_terms: D001466:Barium Sulfate; D002933:Cineradiography; D003106:Colon / Q000502:physiology*; D003287:Contrast Media; D005769:Gastrointestinal Motility; D006801:Humans; D009119:Muscle Contraction; D009130:Muscle, Smooth / Q000502:physiology
chemical_list: D003287:Contrast Media; D001466:Barium Sulfate