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Related Experiment Videos

Vasomotor rhinitis--pathophysiological aspects.

A Anggård

    Rhinology
    |March 1, 1979
    PubMed
    Summary

    Vasomotor rhinitis involves nasal hyperreactivity, possibly from increased parasympathetic activity. Vasoactive substances like substance-P and vasoactive intestinal polypeptide may contribute to nasal responses.

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    Area of Science:

    • Nasal Physiology
    • Neuropharmacology

    Background:

    • Vasomotor rhinitis is characterized by non-specific nasal mucosa hyperreactivity.
    • Symptoms may stem from heightened parasympathetic activity and release of vasoactive substances.
    • Existing research suggests distinct mechanisms for nasal secretion and vascular responses.

    Purpose of the Study:

    • To investigate the neurochemical mediators involved in nasal secreto-vasomotor responses.
    • To differentiate the roles of cholinergic, substance-P (SP), and vasoactive intestinal polypeptide (VIP) pathways.

    Main Methods:

    • Experimental studies in cats.
    • Analysis of nerve fiber content (SP, VIP).
    • Vidian nerve stimulation and assessment of responses.

    Main Results:

    • Postganglionic parasympathetic mediator for nasal secretion is cholinergic.
    • Nasal vascular responses involve different mechanisms.
    • Atropine-resistant vasodilation after Vidian nerve stimulation suggests involvement of SP and VIP.
    • Other substances like SRS and Kallikrein may also play a role.

    Conclusions:

    • Nasal secretion is primarily mediated by cholinergic pathways.
    • Nasal vascular responses are complex, involving multiple neurotransmitters.
    • Substance-P and vasoactive intestinal polypeptide contribute to atropine-resistant vasodilation in the nose.

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