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The cyclic motor patterns in the human colon.

Maham Pervez1, Elyanne Ratcliffe2, Sean P Parsons1

  • 1Department of Medicine, Division of Gastroenterology, Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, ON, Canada.

Neurogastroenterology and Motility
|March 4, 2020
PubMed
Summary

High-resolution colonic manometry revealed distinct motor patterns in the human colon. A high-frequency cyclic motor pattern, crucial for absorption and storage, co-exists with a low-frequency pattern in the rectum.

Keywords:
colonic motilitycyclic motor patternhigh-resolution colonic manometryinterstitial cells of Cajalrectal pressure waves

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Area of Science:

  • Gastroenterology
  • Physiology
  • Colonic Motility

Background:

  • High-resolution colonic manometry offers novel insights into human colon motor patterns.
  • Characterizing rhythmic motor activities across the entire colon is essential for understanding its function.

Purpose of the Study:

  • To characterize persistent, rhythmic motor activities spanning at least 5 cm throughout the entire human colon.
  • To differentiate motor patterns under various physiological conditions.

Main Methods:

  • Utilized high-resolution colonic manometry with an 84-channel water-perfused catheter in 19 healthy volunteers.
  • Assessed rhythmic activity during baseline, proximal balloon distention, meal intake, and bisacodyl administration.

Main Results:

  • Identified a high-frequency cyclic motor pattern (11-13 cycles/min) with mixed propagation, co-existing with a low-frequency pattern (3-4 cycles/min).
  • Observed retrograde propagation of the low-frequency pattern in the rectum, and mixed/simultaneous propagation of the high-frequency pattern in the colon.
  • High-amplitude propagating pressure waves (HAPWs) followed by cyclic motor patterns were induced by stimuli.

Conclusions:

  • Distinct colonic motor patterns, characterized by frequency and propagation, likely serve specialized roles in absorption, storage, and rectal emptying.
  • The observed patterns suggest network properties of interstitial cells of Cajal influence colonic motility.
  • High-frequency patterns in the colon promote absorption and storage, contributing to continence, while low-frequency patterns in the rectum aid in rectal emptying.