Internuclear Ophthalmoplegia
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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