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Daily changes in antro-duodenal myoelectric activity in weaned pigs

Published online by Cambridge University Press:  18 August 2016

G. Yao ,
J. Woliński ,
W. Korczyński  and
R. Zabielski
G. Yao
Affiliation:
The Kielanowski Institute of Animal Physiology and Nutrition, Jablonna, Poland
J. Woliński
Affiliation:
The Kielanowski Institute of Animal Physiology and Nutrition, Jablonna, Poland
W. Korczyński
Affiliation:
The Kielanowski Institute of Animal Physiology and Nutrition, Jablonna, Poland
R. Zabielski*
Affiliation:
The Kielanowski Institute of Animal Physiology and Nutrition, Jablonna, Poland Department of Physiological Sciences, Faculty of Veterinary Medicine, Warsaw Agricultural University, Poland
*
†Corresponding author. The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, 05-110 Jablonna, Poland. E-mail:rzabielski@plusnet.pl
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Abstract

The stomach and small intestine manifest a myoelectric activity pattern called the migrating myoelectric complex (MMC), which is controlled by both environmental and intrinsic factors. The daily MMC pattern has been little investigated, therefore the purpose of the present study was to study it, in weaned pigs given food twice a day. A wireless telemetric recording system was used for 24-h electromyography of the antrum and duodenum. The activity of the antrum showed little change if any, whereas the myoelectric activity of the duodenum significantly changed with respect to the time of day and feeding in conscious pigs. Namely, there were more frequent and regular MMC cycles occurring in the duodenum at night as compared with that during daytime. This change was due to the shortening of phase II of the MMC cycles that were registered at night. Phase I of the MMC showed transient variability in relation to feeding with no impact on the day/night differences. Phase III of the duodenal MMC cycle as well as the ‘feeding pattern’ did not change along with the time of day and feeding regime. In conclusion, daily variation in the duodenum may provide different conditions for digestive processes in the day and night.

Keywords

duodenumelectromyographypigs.
Type
Non-ruminant nutrition, behaviour and production
Information
Animal Science , Volume 76 , Issue 2 , April 2003 , pp. 273 - 281
Copyright
Copyright © British Society of Animal Science 2003

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