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Related Experiment Videos

Pattern-reversal electroretinograms and visual evoked cortical potentials in multiple sclerosis.

H E Persson, P Wanger

    The British Journal of Ophthalmology
    |October 1, 1984
    PubMed
    Summary

    Multiple sclerosis (MS) patients show prolonged visual evoked cortical potential (VECP) latency, indicating optic nerve demyelination. Pattern-reversal electroretinograms (ERG) reveal reduced amplitude in some MS patients, suggesting retinal ganglion cell dysfunction.

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    Area of Science:

    • Neuroscience
    • Ophthalmology
    • Clinical Electrophysiology

    Background:

    • Multiple sclerosis (MS) is a demyelinating disease affecting the central nervous system.
    • Optic nerve involvement is common in MS, leading to visual pathway dysfunction.
    • Electrophysiological tests are crucial for assessing visual pathway integrity in MS.

    Purpose of the Study:

    • To investigate visual pathway function in patients with definite multiple sclerosis (MS) using electrophysiological methods.
    • To correlate findings from pattern-reversal electroretinograms (ERG) and visual evoked cortical potentials (VECP) in MS patients.
    • To explore potential retinal ganglion cell involvement secondary to optic nerve demyelination in MS.

    Main Methods:

    • Recording of pattern-reversal and flash electroretinograms (ERG) and visual evoked cortical potentials (VECP).

    Related Experiment Videos

  • Assessment of VECP latency and ERG amplitude in 15 patients with definite MS.
  • Comparison of electrophysiological data with normal control values.

    • Main Results:

    • All 15 MS patients exhibited prolonged VECP latency, confirming optic nerve demyelination.
    • Reduced pattern-reversal ERG amplitude was observed in 11 of 22 affected eyes with prolonged VECP latency.
    • Flash ERGs showed no abnormalities; pattern-reversal ERG amplitudes were significantly lower in MS patients compared to controls.

    Conclusions:

    • Prolonged VECP latency is a consistent finding in MS, indicative of optic nerve demyelination.
    • Reduced pattern-reversal ERG amplitude in a subset of MS patients suggests secondary retinal ganglion cell dysfunction or degeneration.
    • Electrophysiological assessment, particularly pattern-reversal ERG, can reveal subclinical retinal abnormalities in MS.