Inter‐nuclear ophthalmoplegia caused by subdural hematoma

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Abstract
Internuclear ophthalmoplegia (INO) is caused by lesions in the median longitudinal fasciculus. It is generally the result of primary intraaxial disorders, most commonly multiple sclerosis in young human adults and infarction in older adults. Rarely, extraaxial disorders cause INO by compressing the brainstem. Patients (2) with INO resulting from subdural hematoma with transtentorial herniation are reported. INO is a reliable, but not a pathognomonic, sign of a primary intraaxial disorder.