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Narcolepsy with tinnitus aura: interpretation

L A Marco

    International Journal of Psychiatry in Medicine
    |January 1, 1978
    PubMed
    Summary
    This summary is machine-generated.

    A unique tinnitus sound preceded cataplexy in a narcolepsy patient. This auditory symptom may be linked to muscle atonia and middle ear muscle responses during cataplexy.

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    Area of Science:

    • Neurology
    • Otolaryngology

    Background:

    • Narcolepsy is a chronic neurological disorder characterized by excessive daytime sleepiness and sudden sleep attacks.
    • Cataplexy, a key symptom of narcolepsy, involves a sudden loss of muscle tone, often triggered by emotions.

    Observation:

    • A 55-year-old man presented with narcoleptic-cataplectic attacks.
    • These attacks were preceded by a distinct, high-pressure steam-like tinnitus localized to the right ear.
    • The tinnitus began 60-90 seconds before the cataplectic episode, intensifying and ceasing abruptly with it.

    Findings:

    • The tinnitus is hypothesized to arise from the collapse of jaw muscle tone and decreased proprioceptive input affecting the tensor tympani muscle.
    • This vulnerability of the middle ear may allow for internally generated noise, perceived as tinnitus.

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  • Phasic contractions of the tensor tympani and/or stapedius muscles are postulated to arrest the tinnitus during later stages of cataplexy.

    • Implications:

    • This case suggests a potential link between specific auditory phenomena and the pathophysiology of cataplexy.
    • Understanding this tinnitus may offer new diagnostic insights or therapeutic targets for narcolepsy-cataplexy.
    • Further research into the role of middle ear muscles in narcolepsy is warranted.