Document Detail

Diurnal motor activities of the esophagus in conscious dogs.
MedLine Citation:
PMID:  10961702     Owner:  NLM     Status:  MEDLINE    
Diurnal motor activities of the upper, middle, and lower thirds of the thoracic esophagus, the lower esophageal sphincter, and the gastric body were recorded in six conscious dogs, using extraluminal force transducers. The motor activities of the thoracic esophagus and the lower esophageal sphincter were divided into three major motility patterns: feeding, digestive, and interdigestive. Each motility pattern was basically composed of repetitive bursts of contractions that were clearly classified into type I and II according to their contractile properties. Type I bursts were peristaltic contractions initiated at the upper thoracic esophagus and sequentially propagated distally to include the sphincter. Propagation velocity and duration of type I contractions were similar in all three motility patterns, and these contractions never were propagated into the stomach. Type II bursts were nonperistaltic simultaneous contractions of the thoracic esophagus and lower sphincter appearing synchronously with phase III of gastric interdigestive migrating contractions. Amplitude and duration of type II contractions were maximal at the sphincter, suggesting initiation at that site. In nonfeeding patterns, type I contractions would clear the esophagus of refluxed gastric contents, while type II contractions would prevent reflux.
S Habu; Y Matsushima; H Ishikawa; S Sha; E Okamoto
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Digestive diseases and sciences     Volume:  45     ISSN:  0163-2116     ISO Abbreviation:  Dig. Dis. Sci.     Publication Date:  2000 Jul 
Date Detail:
Created Date:  2000-09-14     Completed Date:  2000-09-14     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  7902782     Medline TA:  Dig Dis Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1267-73     Citation Subset:  AIM; IM    
First Department of Surgery, Hyogo College of Medicine, Nishinomiya, Japan.
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MeSH Terms
Circadian Rhythm*
Digestion / physiology
Eating / physiology
Esophagogastric Junction / physiology
Esophagus / physiology*
Muscle Contraction / physiology
Peristalsis / physiology*

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