Variations nycthémérales du temps de séjour des aliments dans les différents segments du tube digestif chez le rat

Possompes, B.; Choi-Shin, I. S.; Besançon, P.

doi:10.1051/rnd:19810609

Cited by 3 publications

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“…This postprandial accommo dation leads to a return to a normal motility pattern in the ileum. This recovered ileal motor function after feeding must be taken into consideration since in studies with hu mans [32] and rats [33] an important braking action of intraluminal transit was observed in the ileum.…”

Section: Discussionmentioning

confidence: 99%

Changes in Motility after Jejunal and Heal Resection: Electromyographic Study in Rats

Wittmann¹,

Crenner²,

Pousse³

et al. 1985

Digestion

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The aim of this work was to compare the effects of massive jejunal and ileal resections on intestinal motility using an electromyographic technique. Male Wistar rats were used: in the first group a massive jejunal resection was performed, conserving a 7-cm segment after the ligament of Treitz; the rats of the second group underwent an ileal resection, preserving 7 cm of the terminal ileum. Motility was studied at the 10th and 30th postoperative days by means of electrodes implanted throughout the remaining bowel and was expressed by the pattern of recurrence of the migrating myoelectric complex (MMC). In a fasting state, in both transected and resected animals at the 10th postoperative day, the gradient in the duration of MMC along the intestine still existed. However, on the 30th postoperative day, in animals with jejunal resection only, there was an adaptive process: the duration of MMC in the remaining jejunum was significantly increased to the duration in the ileum. After the end of the postprandial inhibition of the appearance of the MMC, on the 10th postoperative day there was a significant decrease in the duration of MMC in the ileum in both types of resection, compared to the controls. However, on the 30th postoperative day, the duration of MMC returned to its control value. In conclusion, jejunal resection seems to induce more important adaptive processes in intestinal motility than does ileal resection. The different results are discussed.

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Section: Discussionmentioning

confidence: 99%

Changes in Motility after Jejunal and Heal Resection: Electromyographic Study in Rats

Wittmann¹,

Crenner²,

Pousse³

et al. 1985

Digestion

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Cyclic motor activity and trophicity after jejunal resection and bypass in rats

1986

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The aim of the study was to examine the changes in intestinal motility induced by an extensive jejunal resection and bypass in rats using an electromyographic technique. The relationship, if any, between the development of motility and adaptive modifications of intestinal trophicity was also studied. A massive jejunal resection, preserving a 7-cm segment distal to the ligament of Treitz, was performed in one group of animals. In a second group, the jejunum was bypassed as a self-emptying blind loop. Two sham-operated groups underwent transection and reanastomosis on the proximal jejunum or ileum. Electromyographic activity was studied at the 10th and 30th postoperative days by means of electrodes implanted throughout the remaining or bypassed bowel and was expressed by means of the pattern of recurrence of the migrating myoelectric complex (MMC). After a month, the animals were sacrificed. Mucosal and muscular wet weight and protein content (mg/cm) of the intestine were then determined. The results showed that 10 days after the jejunal resection in the fasting state, MMC cycle duration is different in the remaining jejunum and in the ileum. However, the distribution of MMC phases in the jejunum was modified and was similar to the one in the ileum. Thirty days after resection, MMC cycle duration, as well as phase distribution in the remaining jejunum, resemble the MMC patterns in the ileum. These changes were not observed after bypass. After the return of MMCs after postprandial inhibition produced by a meal, MMC duration in the ileum was greatly decreased until a month after jejunal resection. In contrast, the jejunal bypass did not produce this modification.

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Optimal Monetary Policy in a Small Open Economy with Financial Frictions

Merola

2010

SSRN Journal

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Variations nycthémérales du temps de séjour des aliments dans les différents segments du tube digestif chez le rat

Cited by 3 publications

References 0 publications

Changes in Motility after Jejunal and Heal Resection: Electromyographic Study in Rats

Changes in Motility after Jejunal and Heal Resection: Electromyographic Study in Rats

Cyclic motor activity and trophicity after jejunal resection and bypass in rats

Optimal Monetary Policy in a Small Open Economy with Financial Frictions

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