Heterogeneity in electrical activity of the canine ileal circular muscle: interaction of two pacemakers

Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society
Marcel JiménezE E Daniel

Abstract

In cross-sectioned slabs from the muscularis externa or in the isolated circular muscle devoid of longitudinal muscle and myenteric plexus (MyP) of ileum, a slow wave, sigmoidal or triangular in shape, was recorded from microelectrode impalements near the deep muscular plexus (DMP) region in the whole-thickness preparation. From the MyP region of whole-thickness preparations, a slow wave which oscillated at a similar frequency (9-10 cycles min-1) was characterized by a fast upstroke and a square shape. Slow waves of mumixed pattern were recorded in the outer circular muscle (OCM) while triangular slow waves were present near the submucous plexus (SMP). In this preparation but not in isolated circular muscle, the inhibitory junction potentials (IJPs) produced by supramaximal electrical field stimulation triggered slow waves. The amplitudes (15-25 mV) of spontaneous and triggered slow waves (TSWs) were greatest in the MyP region, significantly so compared to those of DMP and SMP regions and to those in all regions of isolated circular muscle. Frequencies of slow waves recorded from the MyP and DMP were slightly but significantly higher than those recorded from either the OCM or the SMP or from all regions of isolated circular mus...Continue Reading

References

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Citations

Jul 29, 2005·Digestive Diseases and Sciences·Xiaohua HouJ D Z Chen
Sep 8, 2006·Digestive Diseases and Sciences·Jieyun YinJ D Z Chen
Nov 1, 2001·Journal of Pharmacological and Toxicological Methods·E E DanielL Janssen
Sep 29, 2001·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·E E DanielJ Jury
Sep 30, 2003·The Journal of Physiology·Nick J SpencerTerence K Smith
Nov 11, 2006·The Journal of Physiology·Kenton M Sanders, Sean M Ward
May 19, 2011·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·D GallegoM Jimenez
Feb 8, 2006·Annual Review of Physiology·Kenton M SandersSean M Ward
Dec 16, 2004·International Review of Cytology·Menachem HananiTerumasa Komuro
Jul 8, 2000·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·E E DanielM Mori
Dec 22, 1999·Microscopy Research and Technique·M G Vannucchi
Dec 22, 1999·Microscopy Research and Technique·E E Daniel, Y F Wang
Oct 16, 1999·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·E E Daniel, Y F Wang
Mar 28, 2006·Journal of Cellular and Molecular Medicine·Maria-Simonetta Faussone-Pellegrini
Jun 6, 2006·American Journal of Physiology. Gastrointestinal and Liver Physiology·Diana GallegoMarcel Jiménez
Jul 5, 2008·American Journal of Physiology. Gastrointestinal and Liver Physiology·Diana GallegoMarcel Jiménez
Apr 7, 2004·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·E E Daniel
Oct 18, 2003·American Journal of Physiology. Gastrointestinal and Liver Physiology·E E DanielWooJung Cho
Feb 10, 1999·The American Journal of Physiology·M JiménezE E Daniel
Jul 12, 2001·American Journal of Physiology. Gastrointestinal and Liver Physiology·Y F Wang, E E Daniel
Apr 12, 2003·Neurogastroenterology and Motility : the Official Journal of the European Gastrointestinal Motility Society·T SchultzE E Daniel
Jun 16, 2001·American Journal of Physiology. Gastrointestinal and Liver Physiology·L PlujàM Jiménez

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