Internuclear Ophthalmoplegia | Signs - MedSchool
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Internuclear Ophthalmoplegia

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Overview

  • If present, internuclear ophthalmoplegia is highly suggestive of a lesion affecting the medial longitudinal fasciculus within the brainstem, which is involved in conjugate gaze.
  • The most common causes of lesions in this area would be stroke (older patients) or multiple sclerosis (younger patients).
    • Look For

    • Inability to adduct one eye, with nystagmus in the other eye.
    • Causes of Internuclear Ophthalmoplegia

    • Multiple sclerosis
    • Ischaemic stroke
    • Trauma
    • Infection
    • Tumour
    • Haemorrhage
    • Vasculitis
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