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Related Concept Videos

Gastrointestinal Motility Disorders01:20

Gastrointestinal Motility Disorders

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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...
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Drugs Affecting GI Tract Motility: Dopamine Receptor Antagonists01:28

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Prokinetic agents are specialized medications that stimulate gastrointestinal (GI) motility, promoting food movement through the GI tract. Dopamine, an inhibitory neurotransmitter, plays a significant role in this process, reducing GI motility and indirectly controlling the speed of digestion. Dopamine receptor antagonists, such as metoclopramide and domperidone, offer a unique advantage as prokinetic agents. By blocking the dopamine receptors, these drugs increase GI motility, improving food...
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Gastric Emptying01:16

Gastric Emptying

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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...
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Gastric Motility01:16

Gastric Motility

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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...
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Enteral Nutrition II: Nasointestinal and Gastrostomy Feeding01:15

Enteral Nutrition II: Nasointestinal and Gastrostomy Feeding

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Enteral nutrition encompasses various methods of delivering nutrition directly to the gastrointestinal (GI) tract, bypassing traditional oral intake. It is particularly beneficial for patients who cannot eat by mouth but have a functioning digestive system. Key methods include nasointestinal feeding, gastrostomy, and jejunostomy, each suited to different clinical scenarios based on the patient's needs and condition.
Nasointestinal Feeding
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Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
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In gastric emptying studies, a meal's liquid and...
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Related Experiment Video

Updated: Oct 15, 2025

Assessment of Gastric Emptying in Non-obese Diabetic Mice Using a [13C]-octanoic Acid Breath Test
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Gastroparesis.

Michael Camilleri1, Kenton M Sanders2

  • 1Clinical Enteric Neuroscience Translational and Epidemiological Research, Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota.

Gastroenterology
|October 31, 2021
PubMed
Summary
This summary is machine-generated.

Gastroparesis involves delayed gastric emptying without obstruction. Understanding its mechanisms, pathophysiology, and diagnostics is key for effective nutritional support and future individualized treatments.

Keywords:
Gastric AccommodationGastric EmptyingGastroparesis

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Area of Science:

  • Gastroenterology
  • Physiology
  • Pathophysiology

Background:

  • Gastroparesis is defined by delayed gastric emptying without mechanical blockage.
  • Normal gastric emptying relies on complex myogenic and neuromuscular controls.
  • Animal research predominates, highlighting a need for human gastric muscle studies.

Purpose of the Study:

  • To review normal gastric emptying mechanisms.
  • To explore the pathophysiology of gastroparesis, including neuromuscular and cellular aspects.
  • To discuss diagnostic methods and current management strategies.

Main Methods:

  • Review of animal research on gastric emptying.
  • Analysis of pathophysiology involving neuromuscular diseases, neural control, and pyloric dysfunction.
  • Examination of diagnostic tools like gastric emptying studies and manometry.

Main Results:

  • Gastroparesis pathophysiology involves nonsphincteric muscle, neural control disorders, and pyloric dysfunction.
  • Cellular basis may involve oxidative stress and inflammation.
  • Diagnostic tests include gastric emptying measurements, functional luminal imaging, and manometry.

Conclusions:

  • Understanding normal gastric emptying is crucial for gastroparesis research.
  • Current management includes dietary changes, medications, and interventions like gastric electrical stimulation.
  • Future treatments may be individualized based on precise gastric emptying measurements and pathophysiology.