Dissociated nystagmus in a comatose patient. A clinicopathological study.

Electro-oculographic recordings of dissociated vertical (oblique and upbeat) nystagmus were carried out in a patient in coma due to vascular lesions. Based on the clinical and neuropathological findings, it was suggested that dissociated vertical (oblique and upbeat) nystagmus in a patient in coma can be caused by bilateral lesions in the brachium pontis.