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Blink nystagmus

R J Keim

    Archives of Otolaryngology (Chicago, Ill. : 1960)
    |August 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    A blink-associated eye movement artifact, distinct from Cogan sign, can mimic vestibular nystagmus in healthy individuals. Simultaneous horizontal and vertical eye movement monitoring reliably identifies this artifact during electronystagmography.

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    Area of Science:

    • Ophthalmology
    • Neuroscience
    • Vestibular System

    Background:

    • A specific eye movement pattern resembling vestibular nystagmus is observed in conjunction with blinking.
    • This artifact is present in individuals without auditory or neurological issues and is distinct from Cogan sign (lateral conjugate eye deviation upon lid closure).

    Purpose of the Study:

    • To characterize a blink-associated eye movement artifact.
    • To differentiate this artifact from pathological eye movements, particularly during electronystagmography.
    • To highlight the potential for overestimation of pathological nystagmus due to this artifact.

    Main Methods:

    • Characterization of the eye movement pattern associated with blinking.
    • Comparison with known ocular motor phenomena like Cogan sign.

    Related Experiment Videos

  • Simultaneous monitoring of horizontal and vertical eye movements during electronystagmographic testing.

    • Main Results:

    • The identified artifact mimics vestibular nystagmus but occurs in asymptomatic subjects.
    • This artifact is most apparent during electronystagmography, potentially leading to misinterpretation.
    • Simultaneous recording of horizontal and vertical eye movements proved effective in identifying the artifact.

    Conclusions:

    • A blink-associated nystagmus artifact can be mistaken for true vestibular nystagmus.
    • This artifact is common in healthy individuals and does not indicate pathology.
    • Dual-plane (horizontal and vertical) eye movement monitoring is crucial for accurate diagnosis during electronystagmography.