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Related Experiment Videos

Methanol optic neuropathy: a histopathological study.

J A Sharpe, M Hostovsky, J M Bilbao

    Neurology
    |October 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

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    Methanol intoxication causes myelin damage in the optic nerve and brain, leading to vision loss. This demyelination, likely due to toxic anoxia, affects nerve function and can cause optic disk edema.

    Area of Science:

    • Neuroscience
    • Toxicology
    • Ophthalmology

    Background:

    • Methanol poisoning is a serious condition that can lead to vision loss.
    • The precise histopathologic effects of methanol on the optic nerve are not fully understood.

    Observation:

    • Histopathologic examination of optic nerves from four methanol-intoxicated patients revealed localized myelin damage behind the lamina cribrosa.
    • Axons remained intact, suggesting a selective effect on myelin.
    • One patient also exhibited demyelination in the cerebral white matter.

    Findings:

    • Methanol's metabolic byproducts likely cause histotoxic anoxia in critical circulation areas.
    • This anoxia selectively damages myelin (myelinoclastic effect) in the optic nerve and brain.
    • Juxtabulbar demyelination may lead to optic disk edema via obstruction of axoplasmic flow.

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    Implications:

    • Retrolaminar demyelinating optic neuropathy is an early indicator of visual impairment in methanol intoxication.
    • Disruption of saltatory conduction due to demyelination contributes to visual loss.
    • Understanding these effects is crucial for diagnosing and managing methanol poisoning.