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[Tracheobronchial muscle tonus and its reflex control]
1Laboratoire de Physiologie, URA 1330-CNRS, Faculté de Médecine Secteur Nord, Marseille, France.
Archives Internationales De Physiologie Et De Biochimie
|August 1, 1989
Summary
Airway smooth muscle tone is regulated by vagus nerve activity and a vago-vagal reflex. Understanding neurotransmitters in these pathways is key to modulating airway motor drive.
Area of Science:
- Physiology
- Neuroscience
Context:
- Airway smooth muscle tone is crucial for breathing and influenced by neurogenic input.
- The vagus nerve plays a significant role in regulating airway smooth muscle.
- A vago-vagal reflex loop, initiated by specific receptors, appears to be a primary driver of this tone.
Purpose:
- To elucidate the mechanisms underlying airway smooth muscle tone regulation.
- To identify the roles of different vagal nerve fibers and their associated neurotransmitters.
- To understand how peripheral information is integrated centrally to modulate airway motor drive.
Summary:
- Airway smooth muscle tone is enhanced during inspiration, primarily driven by neurogenic motor output via the vagus nerve.
- This tone is largely mediated by a vago-vagal reflex involving sensory C-fibers from the lungs.
- Modulation also occurs through inhibitory signals from myelinated vagal fibers and other afferent pathways.
Impact:
- Identification of specific neurotransmitters can reveal targets for therapeutic intervention.
- Understanding these pathways aids in comprehending the peripheral modulation of airway motor drive.
- This knowledge contributes to understanding the central integration of respiratory and other bodily signals.