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Related Concept Videos

Gastric Emptying01:16

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...
Gastric Phase of Digestion01:26

Gastric Phase of Digestion

The gastric phase of digestion begins as soon as food enters the stomach. The incoming food bolus triggers neural and hormonal mechanisms, which last approximately 3 to 4 hours. During this phase, the stomach undergoes significant changes to prepare the food for further digestion and absorption.
When food enters the stomach, it stretches the stomach walls and activates stretch receptors. This triggers local reflexes of the enteric nervous system, mediated through the myenteric plexus. These...
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...
Intestinal Phase of Digestion01:29

Intestinal Phase of Digestion

The intestinal phase of digestion is the third and final stage of the digestive process, occurring after the cephalic and gastric phases. It begins when chyme, a partially digested mixture of food and digestive enzymes, enters the small intestine from the stomach. This phase is crucial for nutrient absorption and involves complex hormonal and enzymatic interactions.
The arrival of the chyme in the small intestine distends the duodenum, which triggers the enterogastric reflex. This distension...
Pyloric Obstruction01:11

Pyloric Obstruction

Pyloric obstruction, also referred to as gastric outlet obstruction, is a condition characterized by narrowing or blockage at the pylorus—the muscular valve regulating the flow of stomach contents into the duodenum. When this passage becomes impaired, the stomach cannot effectively empty its contents into the small intestine. This disruption leads to a range of gastrointestinal symptoms, including early satiety, bloating, epigastric pain, postprandial nausea, persistent vomiting, and...
Hormonal Regulation01:40

Hormonal Regulation

Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.

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Related Experiment Video

Updated: May 21, 2026

Autonomous and Rechargeable Microneurostimulator Endoscopically Implantable into the Submucosa
08:17

Autonomous and Rechargeable Microneurostimulator Endoscopically Implantable into the Submucosa

Published on: September 27, 2018

Gastric stimulation for weight loss.

Meir Mizrahi1, Ami Ben Ya'acov, Yaron Ilan

  • 1Gastroenterology and Liver Units, Hebrew University-Hadassah Medical Center, Ein-Karem, Jerusalem, POB1200, Israel.

World Journal of Gastroenterology
|June 2, 2012
PubMed
Summary
This summary is machine-generated.

Gastric electrical stimulation (GES) offers a minimally invasive, safe, and effective approach for sustained weight loss. This therapy may alter gut motility and hormone secretion, showing promise for obesity treatment.

Keywords:
External pacingGastric motilityGastric pacingGastric stimulationIntestinal pacingObesity

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Area of Science:

  • Medical Science
  • Gastroenterology
  • Obesity Research

Background:

  • Obesity prevalence is increasing globally, necessitating effective, minimally invasive treatments.
  • Current obesity therapies like lifestyle changes, drugs, and surgery have limitations in efficacy, durability, or safety.
  • Gastric electrical stimulation (GES) is emerging as a potential therapeutic option for obesity and related gastrointestinal disorders.

Purpose of the Study:

  • To review the current status of Gastric Electrical Stimulation (GES) for obesity treatment.
  • To explore the potential mechanisms of action for GES in weight management.
  • To discuss future applications and patient selection for GES therapy.

Main Methods:

  • Review of existing literature on Gastric Electrical Stimulation (GES) for obesity.
  • Analysis of data from animal models and preliminary human trials.
  • Discussion of physiological mechanisms including gut motility and the gut-brain axis.

Main Results:

  • GES is a promising, minimally invasive, safe, and effective method for obesity treatment.
  • GES may alter gastrointestinal motility, transit time, and nutrient absorption.
  • Preliminary data suggest GES influences the gut-brain axis, potentially affecting hunger and satiety hormones.

Conclusions:

  • Gastric electrical stimulation (GES) presents a viable, minimally invasive option for obesity management.
  • Understanding the mechanisms, including gut-brain axis interaction, is crucial for optimizing GES therapy.
  • Careful patient selection is likely a key factor for successful outcomes in GES for obesity.