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Laryngeal cold receptors.

G Sant'Ambrogio, O P Mathew, F B Sant'Ambrogio

    Respiration Physiology
    |January 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Laryngeal

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    Area of Science:

    • Respiratory Physiology
    • Neuroscience
    • Sensory Receptors

    Background:

    • Previously identified laryngeal 'flow' receptors are activated independently of transmural pressure.
    • The operational characteristics of these specific laryngeal receptors require further investigation.

    Purpose of the Study:

    • To characterize the operational properties of laryngeal 'flow' receptors.
    • To determine the influence of temperature and humidity on laryngeal receptor activity.

    Main Methods:

    • Single unit action potentials were recorded from the superior laryngeal nerve in 15 anesthetized dogs.
    • Receptor activity was analyzed under varying conditions of inspired air temperature and humidity.
    • Experiments were conducted in vivo and in an isolated larynx preparation.

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    Main Results:

    • Laryngeal 'flow' receptors exhibited inspiratory modulation under normal breathing conditions.
    • Receptor activity ceased at higher temperatures (36-40°C) and humidity (100%).
    • Activity increased with decreased laryngeal temperature and was inversely related to temperature in isolated larynx experiments.

    Conclusions:

    • Previously identified laryngeal 'flow' receptors function as thermoreceptors activated by cooling.
    • These receptors demonstrate high dynamic sensitivity and are sensitive to temperature changes in the larynx.