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Related Experiment Videos

Ophthalmoplegia plus, an electro-oculographic study.

G Marconi, P Pagnini, P Vannucchi

    Italian Journal of Neurological Sciences
    |December 1, 1985
    PubMed
    Summary

    Ophthalmoplegia plus (OP) affects central eye movement control structures, particularly the archicerebellum and brainstem. This suggests a supranuclear cause linked to mitochondrial disease.

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    Area of Science:

    • Neuroscience
    • Ophthalmology
    • Mitochondrial Diseases

    Background:

    • Ophthalmoplegia plus (OP) is a rare disorder affecting ocular muscles.
    • Mitochondrial myopathies can involve central nervous system structures.
    • The precise neuroanatomical basis of oculomotor dysfunction in OP remains unclear.

    Purpose of the Study:

    • To investigate the involvement of central oculomotor structures in ophthalmoplegia plus.
    • To correlate clinical eye movement abnormalities with potential central nervous system pathology in OP patients.

    Main Methods:

    • Electro-oculography was performed on 6 patients with ophthalmoplegia plus.
    • Assessment included smooth pursuit, saccadic movements, optokinetic nystagmus, and vestibular reflexes.
    • Patients had varying degrees of extraocular muscle involvement and skeletal muscle mitochondrial changes.

    Main Results:

    • All patients exhibited abnormalities in smooth pursuit and saccadic eye movements.
    • Impairments were also noted in optokinetic nystagmus and vestibular reflexes.
    • Visuovestibular interaction was significantly altered, indicating central oculomotor pathway dysfunction.

    Conclusions:

    • Central oculomotor structures, especially the archicerebellum and brainstem, are affected in ophthalmoplegia plus.
    • Findings support a supranuclear component in the pathogenesis of OP.
    • Brainstem spongiosis in OP suggests a multisystem mitochondrial pathological state.

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