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Related Concept Videos

Enteric Nervous System: Regulation of GI Motor Activity01:11

Enteric Nervous System: Regulation of GI Motor Activity

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The Enteric Nervous System (ENS) plays a pivotal role in regulating gastrointestinal or GI motor activity. This complex network of nerves, deeply embedded within the gut wall, responds to changes in the gut environment and receives input from both the autonomic nervous system and the central nervous system. By doing so, the ENS operates various programs tailored to the body's nutritional status and needs.
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Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
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The neuronal supply to the gastrointestinal (GI) tract is essential for regulating various functions, including digestion, absorption, and movement of food. This intricate network of nerves is known as the enteric nervous system (ENS), often referred to as the "second brain" of the body.
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Gastric motility is the coordinated contraction and relaxation of stomach muscles that convert ingested food into chyme, a semi-liquid substance ready for further digestion in the intestines. The process begins with the vagus nerve inducing the relaxation of the smooth muscles in the fundus and body of the stomach, allowing these regions to expand and accommodate up to approximately 1.5 liters of food and liquid.
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Digestive activity regulation hinges on three primary components. Activation is prompted by a multitude of mechanical and chemical indicators, primarily detected by receptors within the stomach and intestines' walls. These receptors predominantly respond to factors such as mechanical stretching of the organ walls, changes in pH and osmolarity, and the presence of digesting materials and their by-products.
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Updated: Aug 15, 2025

Studying Murine Small Bowel Mechanosensing of Luminal Particulates
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Mechanosensitive Enteric Neurons (MEN) at Work.

Gemma Mazzuoli-Weber1

  • 1Institute for Physiology and Cell Biology, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany. gemma.mazzuoli-weber@tiho-hannover.de.

Advances in Experimental Medicine and Biology
|December 31, 2022
PubMed
Summary
This summary is machine-generated.

Mechanosensitive enteric neurons (MEN) are multifunctional nerve cells in the gut. This review details their characteristics, responses to mechanical stimuli, and pharmacological properties.

Keywords:
Compression/distentionMechanosensitivityMultifunctionalityMyenteric neurons

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Area of Science:

  • Neuroscience
  • Gastroenterology
  • Physiology

Background:

  • Mechanosensitive enteric neurons (MEN) are a key subpopulation involved in gastrointestinal functions.
  • These neurons have been identified across various species and digestive tract regions.
  • Understanding MEN is crucial for comprehending gut motility and sensory processing.

Purpose of the Study:

  • To consolidate and review existing data on multifunctional mechanosensitive enteric neurons (MEN).
  • To describe the proportions, firing patterns, adaptation, and chemical phenotypes of MEN.
  • To discuss MEN's sensitivity to mechanical stimuli (compression, tension) and their pharmacological responses.

Main Methods:

  • Literature review and data synthesis.
  • Characterization of neuronal firing behaviors and adaptation.
  • Analysis of chemical phenotypes and responses to mechanical stimuli.

Main Results:

  • MEN exhibit diverse firing behaviors and adaptation patterns.
  • Specific chemical phenotypes are associated with MEN functions.
  • MEN demonstrate differential sensitivity to compression and tension stimuli.

Conclusions:

  • MEN are versatile mechanosensors integral to gastrointestinal peristalsis.
  • Further research into MEN pharmacology can reveal therapeutic targets.
  • This review provides a comprehensive overview of MEN research.