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Related Experiment Videos

Electromyographic abnormalities following myelography.

R J Weber, S I Weingarden

    Archives of Neurology
    |September 1, 1979
    PubMed
    Summary
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    Electromyography (EMG) abnormalities can occur temporarily after myelography, potentially leading to misdiagnosis. These EMG changes typically resolve within four days, highlighting the need for careful interpretation in clinical practice.

    Area of Science:

    • Neurology
    • Radiology
    • Diagnostic Imaging

    Background:

    • Electromyography (EMG) assesses nerve and muscle function.
    • Myelography is an imaging technique used to visualize the spinal canal.

    Purpose of the Study:

    • To investigate the occurrence and characteristics of electromyographic (EMG) abnormalities following myelography.
    • To determine the temporal course and potential diagnostic implications of these post-myelography EMG changes.

    Main Methods:

    • Electromyography (EMG) studies were performed on 32 patients with previously normal baseline studies.
    • Patients were monitored for EMG abnormalities in the days following myelography.

    Main Results:

    • EMG abnormalities were detected in 13 of 32 patients post-myelography.

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  • These abnormalities typically appeared by day one and resolved by day four.
  • Changes were observed at single paraspinal levels or bilaterally across multiple levels.
  • No correlation was found between EMG changes and patient clinical status or myelography events.

    • Conclusions:

    • Post-myelography EMG abnormalities are transient and can mimic radioculopathy.
    • Performing EMG within four days of myelography may yield false-positive results if paraspinal muscle abnormalities are the sole diagnostic criteria.