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Related Concept Videos

Esophagus01:24

Esophagus

The esophagus, a muscular conduit linking the pharynx and stomach, measures roughly 10 inches (25.4 cm) and sits behind the trachea. It remains collapsed when not swallowing. The esophagus follows a predominantly straight path through the thoracic mediastinum and enters the abdominal cavity through a diaphragmatic opening known as the esophageal hiatus.
The movement of edibles from the pharynx into the esophagus is facilitated by the upper esophageal sphincter, which is formed primarily by the...
Hiatal Hernia01:25

Hiatal Hernia

A hiatal hernia is the abnormal protrusion of the stomach or other abdominal organs through the esophageal hiatus of the diaphragm into the thoracic cavity.Normally, the gastroesophageal junction (GEJ) lies below the diaphragm and is supported by the phrenoesophageal membrane, the diaphragmatic crura, and connective tissues. Weakening of these structures—due to aging, congenital defects like a short esophagus, or increased intra-abdominal pressure from coughing, obesity, pregnancy, or heavy...
Esophageal Achalasia01:27

Esophageal Achalasia

Esophageal achalasia is a chronic neurogenic disorder characterized by impaired relaxation of the lower esophageal sphincter (LES) and absent or ineffective peristalsis in the distal esophagus. This leads to a functional obstruction without a physical blockage, despite significant disruption of esophageal motility.EtiologyAchalasia is caused by degeneration of the myenteric (Auerbach's) plexus, specifically the loss of inhibitory ganglion cells that produce vasoactive intestinal peptide (VIP)...
Gastroesophageal Reflux Disease01:25

Gastroesophageal Reflux Disease

Gastroesophageal reflux disease (GERD) is the backward flow of stomach contents (acid, pepsin, or bile) into the esophagus, causing mucosal inflammation known as esophagitis. It results from failure of antireflux mechanisms, mainly the lower esophageal sphincter (LES), influenced by mechanical and physiological factors.Etiology and Risk FactorsGERD develops when LES function is weakened or when intra-abdominal pressure increases. Risk factors include aging, obesity, and sliding hiatal hernia,...
Gross Anatomy of the Stomach01:16

Gross Anatomy of the Stomach

The human stomach is a vital part of the digestive system, performing multiple functions. It is located within the peritoneum, a serous membrane that lines the abdominal cavity. The stomach plays a central role in processing food substances and interacts with other digestive organs through coordinated digestive processes. The stomach has a characteristic J-shape and is divided into four main regions. The cardia is the first section where the esophagus connects to the stomach and is the entry...
Barrett Esophagus-I: Introduction01:21

Barrett Esophagus-I: Introduction

Barrett's esophagus is a medical condition where the esophageal mucosa is significantly damaged by stomach acid or other digestive fluids, often due to long-term exposure associated with gastroesophageal reflux disease (GERD). In GERD, a weakened or abnormally relaxed lower esophageal sphincter allows stomach acid to flow persistently into the esophagus.
This constant acid exposure transforms the esophagus's pink mucosal lining (stratified squamous epithelium) into a type of lining more similar...

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Related Experiment Videos

The esophagogastric junction.

Larry S Miller1, Anil K Vegesna, James G Brasseur

  • 1Department of Medicine, Temple University, Philadelphia, Pennsylvania, USA.

Annals of the New York Academy of Sciences
|September 29, 2011
PubMed
Summary
This summary is machine-generated.

This study examines the esophagogastric junction

Related Experiment Videos

Area of Science:

  • Gastroenterology and Physiology

Background:

  • The esophagogastric junction (EGJ) is crucial for preventing gastroesophageal reflux.
  • Understanding the EGJ's structure and function is key to addressing GERD.
  • Defects in the EGJ contribute to the pathophysiology of GERD.

Purpose of the Study:

  • To analyze the three component structures of the EGJ sphincteric segment.
  • To investigate pressure contributions from EGJ components in normal and GERD patients.
  • To explore the mechanism of endoscopic plication and in vitro muscle strip studies for GERD pathophysiology.

Main Methods:

  • Commentaries on the three component structures of the EGJ.
  • Analysis of pressure contributions in normal subjects and GERD patients.
  • In vitro muscle strip studies of EGJ defects.

Main Results:

  • Detailed examination of the three sphincteric components of the EGJ.
  • Comparative pressure analysis between normal and GERD patient groups.
  • Identification of potential EGJ defects contributing to GERD through muscle strip studies.

Conclusions:

  • The study provides insights into the structural and functional aspects of the EGJ.
  • Findings contribute to understanding GERD pathophysiology.
  • The research may inform therapeutic strategies for GERD.