Origin of high slow-wave frequency in the dog colon

J. Fioramonti, L. Bueno, S. K. Sarna, Y. Ruckebusch

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Using intraparietal and intraluminal electrodes, duodenal and colonic electrical activities were simultaneously recorded in dogs under pentobarbital anaesthesia to study the temporal relationship between the slow-wave frequency of the colon and that of the proximal duodenum. The colonic electromyogram showed two distinct slow-wave frequencies, one in the range of 7-9 cycles/min, and the other in the range of 18-19 cycles/min. The latter was synchronized to that observed on the duodenum, and disappeared after removal of the entire duodenum and the proximal jejunum over 90 cm, from 8 to 98 cm from the pylorus. After transversally cutting the muscular layers of the duodenum at 8 cm from the pylorus, the high slow-wave frequency of the colon decreased to 16-16.5 cycles/min, similarly to that observed on the duodenum aborally to the section. When another section was performed 5 cm aborally to the first cutting level, the colonic slow-wave frequency was again synchronized to that of the duodenum observed aborally to the second section. Intraduodenal infusion of cold water decreased the amplitude of both the duodenal and the colonic slow-waves by 50% and the frequency by 30%. Since all these experimental procedures did not affect the colonic slow-wave frequency at 7-9 cycles/min, and no temporal relationship was found between duodenal and colonic spiking activities, it was concluded that (i) the colonic slow-wave frequency at 18-19 cycles/min, recorded from both the intraparietal and the intraluminal electrodes in dog, was an 'artefact' of duodenal activity acting as an electric dipole and (ii) that the only slow-wave frequency of 7-9 cycles/min was generated by the colon.

Original languageEnglish (US)
Pages (from-to)983-990
Number of pages8
JournalReproduction Nutrition Developpement
Volume20
Issue number4 A
StatePublished - 1980
Externally publishedYes

Fingerprint

Radio Waves
Duodenum
colon
Colon
duodenum
Dogs
dogs
Pylorus
pylorus
Electrodes
electrodes
Electromyography
Pentobarbital
Jejunum
Artifacts
pentobarbital
electromyography
Anesthesia
jejunum
anesthesia

ASJC Scopus subject areas

  • Medicine(all)

Cite this

Fioramonti, J., Bueno, L., Sarna, S. K., & Ruckebusch, Y. (1980). Origin of high slow-wave frequency in the dog colon. Reproduction Nutrition Developpement, 20(4 A), 983-990.

Origin of high slow-wave frequency in the dog colon. / Fioramonti, J.; Bueno, L.; Sarna, S. K.; Ruckebusch, Y.

In: Reproduction Nutrition Developpement, Vol. 20, No. 4 A, 1980, p. 983-990.

Research output: Contribution to journalArticle

Fioramonti, J, Bueno, L, Sarna, SK & Ruckebusch, Y 1980, 'Origin of high slow-wave frequency in the dog colon', Reproduction Nutrition Developpement, vol. 20, no. 4 A, pp. 983-990.
Fioramonti J, Bueno L, Sarna SK, Ruckebusch Y. Origin of high slow-wave frequency in the dog colon. Reproduction Nutrition Developpement. 1980;20(4 A):983-990.
Fioramonti, J. ; Bueno, L. ; Sarna, S. K. ; Ruckebusch, Y. / Origin of high slow-wave frequency in the dog colon. In: Reproduction Nutrition Developpement. 1980 ; Vol. 20, No. 4 A. pp. 983-990.
@article{310f9e9366994ed894544f7683d7bfc0,
title = "Origin of high slow-wave frequency in the dog colon",
abstract = "Using intraparietal and intraluminal electrodes, duodenal and colonic electrical activities were simultaneously recorded in dogs under pentobarbital anaesthesia to study the temporal relationship between the slow-wave frequency of the colon and that of the proximal duodenum. The colonic electromyogram showed two distinct slow-wave frequencies, one in the range of 7-9 cycles/min, and the other in the range of 18-19 cycles/min. The latter was synchronized to that observed on the duodenum, and disappeared after removal of the entire duodenum and the proximal jejunum over 90 cm, from 8 to 98 cm from the pylorus. After transversally cutting the muscular layers of the duodenum at 8 cm from the pylorus, the high slow-wave frequency of the colon decreased to 16-16.5 cycles/min, similarly to that observed on the duodenum aborally to the section. When another section was performed 5 cm aborally to the first cutting level, the colonic slow-wave frequency was again synchronized to that of the duodenum observed aborally to the second section. Intraduodenal infusion of cold water decreased the amplitude of both the duodenal and the colonic slow-waves by 50{\%} and the frequency by 30{\%}. Since all these experimental procedures did not affect the colonic slow-wave frequency at 7-9 cycles/min, and no temporal relationship was found between duodenal and colonic spiking activities, it was concluded that (i) the colonic slow-wave frequency at 18-19 cycles/min, recorded from both the intraparietal and the intraluminal electrodes in dog, was an 'artefact' of duodenal activity acting as an electric dipole and (ii) that the only slow-wave frequency of 7-9 cycles/min was generated by the colon.",
author = "J. Fioramonti and L. Bueno and Sarna, {S. K.} and Y. Ruckebusch",
year = "1980",
language = "English (US)",
volume = "20",
pages = "983--990",
journal = "Animal",
issn = "1751-7311",
publisher = "Cambridge University Press",
number = "4 A",

}

TY - JOUR

T1 - Origin of high slow-wave frequency in the dog colon

AU - Fioramonti, J.

AU - Bueno, L.

AU - Sarna, S. K.

AU - Ruckebusch, Y.

PY - 1980

Y1 - 1980

N2 - Using intraparietal and intraluminal electrodes, duodenal and colonic electrical activities were simultaneously recorded in dogs under pentobarbital anaesthesia to study the temporal relationship between the slow-wave frequency of the colon and that of the proximal duodenum. The colonic electromyogram showed two distinct slow-wave frequencies, one in the range of 7-9 cycles/min, and the other in the range of 18-19 cycles/min. The latter was synchronized to that observed on the duodenum, and disappeared after removal of the entire duodenum and the proximal jejunum over 90 cm, from 8 to 98 cm from the pylorus. After transversally cutting the muscular layers of the duodenum at 8 cm from the pylorus, the high slow-wave frequency of the colon decreased to 16-16.5 cycles/min, similarly to that observed on the duodenum aborally to the section. When another section was performed 5 cm aborally to the first cutting level, the colonic slow-wave frequency was again synchronized to that of the duodenum observed aborally to the second section. Intraduodenal infusion of cold water decreased the amplitude of both the duodenal and the colonic slow-waves by 50% and the frequency by 30%. Since all these experimental procedures did not affect the colonic slow-wave frequency at 7-9 cycles/min, and no temporal relationship was found between duodenal and colonic spiking activities, it was concluded that (i) the colonic slow-wave frequency at 18-19 cycles/min, recorded from both the intraparietal and the intraluminal electrodes in dog, was an 'artefact' of duodenal activity acting as an electric dipole and (ii) that the only slow-wave frequency of 7-9 cycles/min was generated by the colon.

AB - Using intraparietal and intraluminal electrodes, duodenal and colonic electrical activities were simultaneously recorded in dogs under pentobarbital anaesthesia to study the temporal relationship between the slow-wave frequency of the colon and that of the proximal duodenum. The colonic electromyogram showed two distinct slow-wave frequencies, one in the range of 7-9 cycles/min, and the other in the range of 18-19 cycles/min. The latter was synchronized to that observed on the duodenum, and disappeared after removal of the entire duodenum and the proximal jejunum over 90 cm, from 8 to 98 cm from the pylorus. After transversally cutting the muscular layers of the duodenum at 8 cm from the pylorus, the high slow-wave frequency of the colon decreased to 16-16.5 cycles/min, similarly to that observed on the duodenum aborally to the section. When another section was performed 5 cm aborally to the first cutting level, the colonic slow-wave frequency was again synchronized to that of the duodenum observed aborally to the second section. Intraduodenal infusion of cold water decreased the amplitude of both the duodenal and the colonic slow-waves by 50% and the frequency by 30%. Since all these experimental procedures did not affect the colonic slow-wave frequency at 7-9 cycles/min, and no temporal relationship was found between duodenal and colonic spiking activities, it was concluded that (i) the colonic slow-wave frequency at 18-19 cycles/min, recorded from both the intraparietal and the intraluminal electrodes in dog, was an 'artefact' of duodenal activity acting as an electric dipole and (ii) that the only slow-wave frequency of 7-9 cycles/min was generated by the colon.

UR - http://www.scopus.com/inward/record.url?scp=0019125691&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0019125691&partnerID=8YFLogxK

M3 - Article

C2 - 7349466

AN - SCOPUS:0019125691

VL - 20

SP - 983

EP - 990

JO - Animal

JF - Animal

SN - 1751-7311

IS - 4 A

ER -