Retrograde oesophageal contractions in the dog.
Retrograde oesophageal contractions were observed by simultaneous radiography and electromyography during naturally occurring post-prandial eructations in six dogs. The contractions progressed cranially at 85 +/- 16 cm s-1 (S.E.M., n = 50) displacing, to the mouth, gastric gas which had previously passed into and distended the thoracic part of the oesophagus for 304 +/- 22 ms (S.E.M., n = 30). Ninety per cent (n = 100) of retrograde oesophageal contractions were followed immediately by a slower aboral contraction (17.1 +/- 0.02 cm s-1; S.E.M., n = 15). This appears to be the first description of naturally occurring retrograde oesophageal contractions in a non-ruminant animal.
Heywood
L H
LH
Department of Veterinary Physiology, University of Sydney, N.S.W., Australia.
Wood
A K
AK
D000818:Animals; D004285:Dogs; D004326:Drinking; D004435:Eating; D004576:Electromyography; D004947:Esophagus / Q000502:physiology*; D005260:Female; D008297:Male; D009119:Muscle Contraction; D014741:Video Recording