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Related Experiment Videos

Focal facial spasm.

K L Nudleman, A Starr

    Neurology
    |August 1, 1983
    PubMed
    Summary
    This summary is machine-generated.

    Focal facial spasms in a woman were modified by peripheral facial nerve factors. Biofeedback offered control, suggesting a disorder influenced by both peripheral and central mechanisms.

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    Area of Science:

    • Neurology
    • Neurophysiology

    Background:

    • Focal facial spasm is characterized by involuntary contractions.
    • Investigating the underlying mechanisms is crucial for effective treatment.

    Observation:

    • A 32-year-old woman presented with left-sided facial spasms affecting the mouth and nasal area.
    • Spasms ceased with digital pressure on the peripheral facial nerve.
    • Local anesthetic blockade and nerve crushing differentiated voluntary from involuntary movements.

    Findings:

    • Blink reflexes showed unilateral left synkinesis.
    • Facial EMG revealed clonic discharges and rapid motor unit firing (200 Hz).
    • Pharmacological treatments (diphenylhydantoin, carbamazepine, prednisone) were ineffective; neurolysis provided temporary relief.

    Implications:

    • Biofeedback effectively controlled the focal facial spasms.
    • The findings suggest focal facial spasms may stem from facial nucleus disorders.
    • These disorders appear influenced by both peripheral and central nervous system mechanisms.