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Gastrointestinal Motility Disorders

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...

Gastric Motility

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...

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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...

Gastric Emptying

Gastric Emptying

Gastric emptying occurs when the stomach gradually releases chyme into the duodenum. When the stomach is distended, it triggers the release of gastrin, a hormone that promotes gastric acid secretion to aid in digestion. Additionally, stomach distension contributes to peristaltic waves that propel gastric contents toward the pyloric region. The gastroenteric reflex, on the other hand, primarily stimulates peristalsis in the intestines, facilitating the movement of contents further along the...

Small Intestine

Small Intestine

The small intestine is primarily responsible for digestion and nutrient absorption. It spans from the pyloric sphincter to the ileocecal valve and connects to the large intestine.
The small intestine is divided into three main sections - the duodenum, jejunum, and ileum. The duodenum, approximately 25 cm long, is nearest the stomach. It acts as a 'mixing bowl,' where chyme (partially digested food) blends with digestive enzymes from the pancreas and liver. The duodenum's unique C-shape wraps...

Drugs Affecting GI Tract Motility: Serotonin Receptor Agonists

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...

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Related Experiment Video

Updated: Jun 16, 2026

Studying Murine Small Bowel Mechanosensing of Luminal Particulates

Studying Murine Small Bowel Mechanosensing of Luminal Particulates

Published on: March 18, 2022

Small bowel motility: ready for prime time?

¹Department of Gastroenterology, The Cleveland Clinic Foundation, S40, 9500 Euclid Avenue, Cleveland, OH 44195, USA. soffere@ccf.org

Current Gastroenterology Reports

|September 22, 2000

Summary

This summary is machine-generated.

Small bowel motor patterns ensure nutrient absorption, involving complex interactions. Intestinal dysmotility arises from disruptions, with limited treatment options beyond supportive care and transplantation.

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Gastrointestinal Motility Monitor (GIMM)

Gastrointestinal Motility Monitor (GIMM)

Published on: December 2, 2010

Area of Science:

Gastroenterology
Physiology
Neurogastroenterology

Background:

The small bowel's primary role is nutrient absorption, facilitated by coordinated motor patterns.
These patterns result from intricate interactions among the enteric nervous system, extrinsic nerves, regulatory peptides, and smooth muscle.
Interstitial cells of Cajal act as pacemakers, governing the basic electrical rhythm and intestinal contractions.

Purpose of the Study:

To explore the pathophysiology of small bowel dysmotility.
To highlight the diagnostic challenges and current treatment limitations for intestinal dysmotility.

Main Methods:

Review of existing literature on small bowel physiology and dysmotility.
Discussion of diagnostic tools like transit studies and intestinal manometry.
Analysis of challenges in obtaining and analyzing intestinal tissue for research.

Main Results:

Small bowel dysmotility stems from diseases affecting the enteric nervous system, extrinsic nerves, regulatory peptides, or smooth muscle.
Current diagnostic methods have limitations, particularly in understanding underlying pathophysiology due to tissue analysis difficulties.
Effective drug therapies to enhance small bowel propulsive function are lacking.

Conclusions:

Intestinal dysmotility management primarily involves dietary changes and nutritional support (enteral or parenteral).
Small bowel transplantation is a critical option for refractory cases.
Further research is needed to overcome diagnostic hurdles and develop targeted therapies.