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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...

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...

Gastritis-II: Pathophysiology

Gastritis-II: Pathophysiology

Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...

Gastric Phase of Digestion

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...

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Related Experiment Video

Updated: Nov 29, 2025

Laparoscopy-endoscopy Cooperative Surgery for the Treatment of Gastric Gastrointestinal Stromal Tumors

Laparoscopy-endoscopy Cooperative Surgery for the Treatment of Gastric Gastrointestinal Stromal Tumors

Published on: February 19, 2022

Gastric Glomus Tumor.

Sumitoj Singh¹, Ashok Kumar¹, Vikas Singh¹

¹Department of General Surgery, Government Medical College, Amritsar, Punjab, India.

Nigerian Journal of Surgery : Official Publication of the Nigerian Surgical Research Society

|November 23, 2020

Summary

This summary is machine-generated.

Glomus tumors of the stomach are rare mesenchymal tumors, often misdiagnosed as gastrointestinal stromal tumors (GISTs). Immunohistochemical markers like DOG-1 are crucial for accurate diagnosis, differentiating glomus tumors from GISTs.

Area of Science:

Gastroenterology
Surgical Pathology
Oncology

Background:

Glomus tumors are rare mesenchymal neoplasms, typically benign, constituting approximately 1% of all gastrointestinal soft-tissue tumors.

Keywords:

Gastrointestinal stromal tumor glomus tumor mesenchymal origin

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Preoperative diagnosis of gastric glomus tumors is challenging due to nonspecific clinical and imaging characteristics, frequently leading to misdiagnosis as gastrointestinal stromal tumors (GISTs).