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Local Motility, Flow and Mixing in Tubular Segments of the Gut

  • Roger G. Lentle
  • Patrick W. M. Janssen
Chapter

Abstract

The contractile activity within the various tubular segments of the gut is reviewed in the first two chapters which describe motility in intestinal segments of increasingly complex form and function. Firstly, the characteristics of propulsive contractions in segments that act simply as conduits are described including those in which contractions bring about pressure-driven extrusion of material from the segment i.e. the pharynx and rectum, and that in which material is propelled piecemeal by simple propagating peristaltic contractions i.e. the oesophagus. The sequencing of these contractile events, their effects on lumen contents and their variation with the physical state of the contents are described. The various contractile activities of the small intestine that are concerned both with propulsion and mixing are then described with detailed descriptions of the contractile constituents of peristalsis, segmentation and pendular movements along with their effects on lumen contents.

Keywords

Anal Canal Contractile Activity Circular Muscle Central Pattern Generator Food Bolus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Institute of Food Nutrition and Human HealthMassey UniversityPalmerston NorthNew Zealand

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