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The oto-respiratory reflex

T Todisco

    Respiration; International Review of Thoracic Diseases
    |January 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    The oto-respiratory (O-R) reflex, a cough triggered by ear canal stimulation, was observed in 16% of subjects. A smaller group also showed the oto-bronchial (O-B) reflex, indicating bronchoconstriction.

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    Area of Science:

    • Neuroscience
    • Physiology
    • Otolaryngology

    Background:

    • The oto-respiratory (O-R) reflex involves coughing due to mechanical stimulation of the external auditory meatus.
    • Distinct efferent pathways exist for coughing and bronchoconstriction, allowing for dissociation between the O-R and oto-bronchial (O-B) reflexes.

    Purpose of the Study:

    • To investigate the prevalence of the O-R reflex in normal subjects.
    • To determine the incidence of the O-B reflex in conjunction with the O-R reflex.
    • To explore potential links between these reflexes and atopy.

    Main Methods:

    • Mechanical stimulation of the deep posterior wall of the external auditory meatus was performed.
    • The presence of the O-R reflex (coughing) and O-B reflex (bronchoconstriction) was documented.

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  • Family history of atopy was recorded in subjects exhibiting the reflexes.

    • Main Results:

    • 16% (20 out of 125) of normal subjects exhibited the O-R reflex.
    • In 7 of these 20 subjects, the O-B reflex (bronchoconstriction) was also observed.
    • The O-B reflex was pronounced in 3 subjects, who also reported a family history of atopy.

    Conclusions:

    • The O-R reflex is present in a subset of the normal population.
    • The O-B reflex can co-occur with the O-R reflex, particularly in individuals with a family history of atopy.
    • Further animal research is needed to elucidate the precise neural pathways of the O-R reflex and its protective function remains unclear.