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Related Experiment Videos

Normal equine gastroduodenal secretion and motility.

A M Merritt1

  • 1Island Whirl Equine Colic Research Laboratory, College of Veterinary Medicine, University of Florida, Gainesville, USA.

Equine Veterinary Journal. Supplement
|March 4, 2000
PubMed
Summary

This study reviews equine gastroduodenal functions, detailing how stomach acid secretion and motility are controlled. It highlights that duodenal reflux into the stomach is common in horses, especially during migrating motility complex (MMC) activity.

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Area of Science:

  • Veterinary Science
  • Equine Physiology
  • Gastroenterology

Background:

  • Understanding equine gastroduodenal function is crucial for horse health.
  • The equine stomach has unique anatomical features, including a large nonglandular portion.
  • Gastroduodenal secretory and motor activities are complex and interconnected.

Purpose of the Study:

  • To provide an overview of current knowledge on equine gastroduodenal secretory and motor activity.
  • To explore the control mechanisms and interactions of these functions.
  • To discuss the implications of duodenogastric reflux in horses.

Main Methods:

  • Review of existing literature on equine gastric mucosal anatomy.
  • Analysis of studies on gastric acid secretion control using cannulation and pH monitoring.

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  • Discussion of methods for evaluating gastroduodenal motility, including myoelectrical activity, intraluminal pressure, and radiolabeled content transit.
  • Examination of the role of the gastroduodenal migrating motility complex (MMC).

    • Main Results:

    • The horse's gastroduodenal system allows relatively unobstructed content movement between the stomach and duodenum.
    • Gastric pH is significantly influenced by duodenal content reflux.
    • The migrating motility complex (MMC) appears to affect fasting gastric content composition.
    • Duodenogastric reflux is likely a common event in horses, particularly during MMC-related antral motility cessation.

    Conclusions:

    • Equine gastroduodenal secretory and motor functions are intricately controlled and interact significantly.
    • The frequent reflux of duodenal contents into the stomach is a notable aspect of equine digestive physiology.
    • Further research into these mechanisms can improve equine gastrointestinal health management.