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Related Experiment Videos

Trigeminal dysfunction in patients with Bell's palsy.

P Hanner, G Badr, U Rosenhall

    Acta Oto-Laryngologica
    |March 1, 1986
    PubMed
    Summary

    Acute facial palsy often indicates central nervous system issues. Electrophysiological tests revealed trigeminal dysfunction and brainstem involvement in a significant number of patients.

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    Elevated levels of myelin basic protein in CSF in relation to auditory brainstem responses in Bell's Palsy.

    Acta oto-laryngologica·2011

    Area of Science:

    • Neurology
    • Neurophysiology

    Background:

    • Acute unilateral peripheral facial palsy (Bell's palsy) is common.
    • Its underlying cause, particularly central nervous system involvement, requires further investigation.

    Purpose of the Study:

    • To assess trigeminal nerve function in patients with acute peripheral facial palsy.
    • To identify central nervous system involvement using electrophysiological methods.

    Main Methods:

    • Electrophysiological testing including trigeminus-evoked potential (TEP) and blink reflex (BR) tests.
    • Auditory brainstem response (ABR) was used to evaluate brainstem function.
    • Testing was performed within 5 weeks of disease onset in 30 patients.

    Main Results:

    • Trigeminal dysfunction was detected in 47% (TEP) and 60% (BR) of patients.
    • Brainstem involvement was suggested by BR in 24% and ABR in 28% of patients.
    • TEP indicated pathology in 7% of cases where BR was normal, suggesting multifocal lesions.

    Conclusions:

    • Acute facial palsy is frequently associated with central nervous system affections.
    • Electrophysiological assessment is crucial for detecting subclinical trigeminal and brainstem dysfunction.
    • Findings support the hypothesis of central nervous system involvement in many cases of acute facial palsy.

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