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Related Concept Videos

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and solid...
Gastrointestinal Motility Disorders01:20

Gastrointestinal Motility Disorders

Gastrointestinal or GI motility disorders are characterized by irregular gastrointestinal tract movements, disrupting food transit from the mouth to the anus. They are caused by damage or dysfunction in gut muscles or nerves. These disorders can cause symptoms such as severe constipation, diarrhea, abdominal pain, and swallowing difficulties. Disorders can affect any segment of the GI tract and range widely in severity, from common conditions like GERD to life-threatening conditions like...
Enteric Nervous System: Regulation of GI Motor Activity01:11

Enteric Nervous System: Regulation of GI Motor Activity

The Enteric Nervous System (ENS) plays a pivotal role in regulating gastrointestinal or GI motor activity. This complex network of nerves, deeply embedded within the gut wall, responds to changes in the gut environment and receives input from both the autonomic nervous system and the central nervous system. By doing so, the ENS operates various programs tailored to the body's nutritional status and needs.
During periods of fasting, the ENS initiates the migrating myoelectric complex, a program...
Drugs Affecting GI Tract Motility: Serotonin Receptor Agonists01:23

Drugs Affecting GI Tract Motility: Serotonin Receptor Agonists

Serotonin, a crucial neurotransmitter synthesized by enterochromaffin cells, plays a cardinal role in regulating gastrointestinal (GI) motility. With over 90% of the body's total serotonin in the GI tract, its influence on digestive processes is profound. Serotonin is swiftly released upon various stimuli, such as food boluses or certain drugs, triggering intrinsic sensory neurons in the myenteric plexus and extrinsic vagal and spinal sensory neurons. This leads to the activation of the...
Gastric Motility01:16

Gastric Motility

Gastric motility is the coordinated contraction and relaxation of stomach muscles that convert ingested food into chyme, a semi-liquid substance ready for further digestion in the intestines. The process begins with the vagus nerve inducing the relaxation of the smooth muscles in the fundus and body of the stomach, allowing these regions to expand and accommodate up to approximately 1.5 liters of food and liquid.
Peristaltic Waves and Chyme Formation
Upon food entry, the stomach initiates...
Drugs Affecting GI Tract Motility: Other Laxatives01:20

Drugs Affecting GI Tract Motility: Other Laxatives

Laxatives are primarily used to alleviate constipation, a common gastrointestinal disorder characterized by infrequent bowel movements and difficulty passing stools. They work by various mechanisms to increase the volume or frequency of bowel movements. The primary modes of action of laxatives include increasing stool bulk, softening the stool, stimulating intestinal motility, and osmotically drawing water into the intestines.
Osmotic or saline laxatives, like magnesium hydroxide or milk of...

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Related Experiment Video

Updated: Jun 21, 2026

Spatiotemporal Mapping of Motility in Ex Vivo Preparations of the Intestines
12:00

Spatiotemporal Mapping of Motility in Ex Vivo Preparations of the Intestines

Published on: January 27, 2016

Intestinal motor activity, endoluminal motion and transit.

F de Iorio1, C Malagelada, F Azpiroz

  • 1Digestive System Research Unit, University Hospital Vall d'Hebron, Barcelona, Spain.

Neurogastroenterology and Motility
|July 21, 2009
PubMed
Summary

Computer vision and machine learning accurately detect reduced intestinal muscle activity and motion. Glucagon administration significantly inhibited intestinal wall motion and luminal content dynamics in healthy subjects.

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Related Experiment Videos

Last Updated: Jun 21, 2026

Spatiotemporal Mapping of Motility in Ex Vivo Preparations of the Intestines
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Published on: January 27, 2016

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Video Imaging and Spatiotemporal Maps to Analyze Gastrointestinal Motility in Mice

Published on: February 3, 2016

Area of Science:

  • Gastroenterology
  • Medical Imaging
  • Computational Biology

Background:

  • Intestinal motility is crucial for digestion and nutrient absorption.
  • Evaluating intestinal motility traditionally involves invasive procedures.
  • Novel computational methods offer non-invasive assessment of gastrointestinal function.

Purpose of the Study:

  • To assess the impact of intestinal muscle inhibition on small bowel motility.
  • To validate a computer vision and machine learning program for analyzing endoluminal images.
  • To quantify changes in wall motion, luminal content dynamics, and transit time.

Main Methods:

  • Fourteen healthy subjects underwent capsule endoscopy.
  • Seven subjects received glucagon to inhibit intestinal motility; seven served as controls.
  • A computer vision program analyzed endoluminal images for muscle activity, content, motion, and transit.

Main Results:

  • Glucagon significantly reduced intestinal contractile activity (P < 0.05).
  • Endoluminal motion was significantly reduced during glucagon infusion (P < 0.05).
  • No significant differences were observed in baseline motility between groups.

Conclusions:

  • Computer vision and machine learning reliably detect reduced intestinal muscle activity.
  • Glucagon effectively inhibits intestinal motility, as evidenced by image analysis.
  • This technology provides a sensitive tool for evaluating gastrointestinal motor function.