Small Intestinal Motility

Overview
  • Motility of the small intestine allows ingested foods to be mixed with digestive fluids, exposes foods to the small intestine mucosa for absorption, and moves the foods along the length of the intestine. The small intestine displays both peristaltic and mixing patterns of contractions as described in GI Motility Patterns.
Regulation
Ileocecal Valve and Sphincter
  • Between the small intestine and the large intestine lie the ileocecal valve and ileocecal sphincter. The valve prevents backflow of contents from the colon into the ileum while the ileocecal sphincter can regulate the emptying of the ileum into the cecum. The ileocecal sphincter generally remains closed if there is irritation or distension in the cecum and generally opens after a meal.