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Related Experiment Videos

Ocular dipping in anoxic coma

A H Ropper

    Archives of Neurology
    |May 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Patients experiencing anoxic coma exhibit a unique cyclic eye movement. This ocular dipping, distinct from other eye movement disorders, may indicate cortical and basal ganglia damage.

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    Area of Science:

    • Neurology
    • Ophthalmology
    • Neuroscience

    Background:

    • Anoxic coma presents complex neurological challenges.
    • Understanding associated ocular motor signs is crucial for diagnosis.

    Observation:

    • A distinct cyclic, downward-dipping eye motion was observed in patients with anoxic coma.
    • This movement differs from ocular bobbing, seizure-related eye deviation, oculogyric crisis, and roving eye movements.
    • Key characteristics include slow downward movement with rapid upward flick, a nadir at extreme downgaze, and spontaneous horizontal roving.

    Findings:

    • Necropsy in one case and CT scans showing basal ganglia lesions in another suggest a link.
    • Cortical dysfunction coupled with basal ganglia damage is proposed as the cause of this ocular dipping.

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    Implications:

    • Ocular dipping may serve as a specific clinical sign of anoxic brain injury.
    • This finding could refine diagnostic approaches for patients in anoxic coma.
    • Further research into the neuroanatomical basis of ocular motor abnormalities in coma is warranted.