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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...
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...
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...
Barrett Esophagus-II: Clinical Manifestations and Management01:21

Barrett Esophagus-II: Clinical Manifestations and Management

Individuals with Barrett's esophagus are often asymptomatic, but they may experience symptoms commonly associated with GERD, such as heartburn and acid regurgitation. Additional symptoms can include difficulty swallowing, chest pain, unintentional weight loss, blood in the stool (which may appear black, tarry, or bloody), and episodes of vomiting.
To diagnose Barrett's esophagus, healthcare providers often recommend an endoscopy for those showing symptoms of acid reflux. The procedure entails...
Esophageal Strictures-I: Introduction01:30

Esophageal Strictures-I: Introduction

Esophageal strictures involve abnormal narrowing or tightening of the esophagus. They vary in length and severity, ranging from mild constriction to complete obstruction, and are classified as benign (noncancerous) or malignant (cancerous).
Etiology
The primary cause of esophageal strictures is long-standing gastroesophageal reflux disease (GERD), accounting for about 70 to 80% of adult cases. Chronic acid reflux can lead to injury and scarring of the esophageal lining, culminating in...
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)...

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Related Experiment Video

Updated: Jul 12, 2026

Diagnosis of Neoplasia in Barrett’s Esophagus using Vital-dye Enhanced Fluorescence Imaging
06:55

Diagnosis of Neoplasia in Barrett’s Esophagus using Vital-dye Enhanced Fluorescence Imaging

Published on: May 11, 2014

Motility differences between long-segment and short-segment Barrett's esophagus

R J Mason1, C C Bremner

  • 1Department of Surgery, University of the Witwatersrand Medical School, Parktown, South Africa.

American Journal of Surgery
|June 1, 1993
PubMed
Summary
This summary is machine-generated.

Barrett

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Last Updated: Jul 12, 2026

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Area of Science:

  • Gastroenterology and Esophageal Motility Disorders

Background:

  • Barrett's esophagus is often considered a motility disorder, but its causal relationship with esophageal columnar lining is debated.
  • Understanding the progression of esophageal motility changes in Barrett's esophagus is crucial for patient management.

Purpose of the Study:

  • To investigate the relationship between the extent of Barrett's esophagus and esophageal motility patterns.
  • To determine if esophageal motility abnormalities precede or follow the development of columnar metaplasia.

Main Methods:

  • Analysis of esophageal motility records from 70 patients with histologically confirmed Barrett's esophagus.
  • Comparison of swallow responses between patients with limited (3-5 cm) and extensive (>5 cm) Barrett's segments.

Main Results:

  • Patients with extensive Barrett's esophagus showed significantly lower esophageal contraction amplitude (p < 0.01) and longer contraction duration (p < 0.01) compared to those with limited segments.
  • These motility differences were most pronounced in the distal esophagus.
  • A progressive decline in esophageal motility was observed with advanced disease stages.

Conclusions:

  • Esophageal motility abnormalities, particularly reduced amplitude and prolonged duration of contractions, are associated with extensive Barrett's esophagus.
  • These findings suggest a deterioration of esophageal function with disease progression in Barrett's esophagus.
  • Further research is needed to elucidate the precise sequence of events in Barrett's esophagus development.