title: Ex vivo motility in the base of the rabbit caecum and its associated structures: an electrophysiological and spatiotemporal analysis.
abstract: We examined the coordination between contractile events at different sites in the basal portion of the rabbit caecum and its associated structures that were identified by electrophysiological recordings with simultaneous one-dimensional, and a novel two-dimensional, spatiotemporal mapping technique. The findings of this work provide evidence that the caecum and proximal colon/ampulla coli act reflexly to augment colonic outflow when the caecum is distended and mass peristalsis instituted, the action of the latter overriding the inherent rhythm and direction of haustral propagation in the adjacent portion of the proximal colon but not in the terminal ileum. Further, the findings suggest that the action of the sacculus rotundus may result from its distension with chyme by ileal peristalsis and that the subsequent propagation of contraction along the basal wall of the caecum towards the colon may be augmented by this local distension.
authors.affiliation: Institute of Food, Nutrition and Human Health, Massey University, Private Bag 11222, Palmerston North, New Zealand.
authors.forename: Corrin
authors.initials: C
authors.lastname: Hulls
authors.affiliation: Institute of Food, Nutrition and Human Health, Massey University, Private Bag 11222, Palmerston North, New Zealand. r.g.lentle@massey.ac.nz.
authors.forename: Roger G
authors.initials: RG
authors.lastname: Lentle
authors.affiliation: Institute of Food, Nutrition and Human Health, Massey University, Private Bag 11222, Palmerston North, New Zealand.
authors.forename: Gordon W
authors.initials: GW
authors.lastname: Reynolds
authors.affiliation: Institute of Food, Nutrition and Human Health, Massey University, Private Bag 11222, Palmerston North, New Zealand.
authors.forename: Patrick W M
authors.initials: PW
authors.lastname: Janssen
authors.affiliation: Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Private Bag 11222, Palmerston North, New Zealand.
authors.forename: Paul
authors.initials: P
authors.lastname: Chambers
authors.affiliation: UMR 782 Génie et Microbiologie des Procédés Alimentaires, INRA, AgroParisTech CBAI, 78850, Thiverval Grignon, France.
authors.forename: Clement
authors.initials: C
authors.lastname: de Loubens
mesh_terms: D000818:Animals; D002432:Cecum / Q000502:physiology*; D004594:Electrophysiology; D011817:Rabbits
keywords: Caecum; Contractile activity; Coordination; Rabbit; Spatiotemporal