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Ipsiversive eye deviation and epileptic nystagmus

Department of Neurology, Johns Hopkins University, School of Medicine, Baltimore, MD.

We studied an 11-year-old boy with focal seizures in the right temporo-occipital cortex. During the seizure, there was a 1- to 2-second period of ipsiversive (rightward) conjugate eye deviation, followed by 10 to 15 seconds of horizontal jerk nystagmus with slow phases that were directed to the right and appeared linear. The patient was conscious throughout the seizure. These findings fit the description of epileptic nystagmus. We postulate that the eye deviation and slow phases of the nystagmus in this patient were induced by epileptic activation of a cerebral smooth pursuit pathway originating from temporo-occipital cortex.

Address correspondence and reprint requests to Dr. Ronald J. Tusa, Department of Neurology, Meyer 2-147, Johns Hopkins Hospital, Baltimore, MD 21205

Received July 25, 1989. Accepted for publication in final form September 25, 1989.

This article has been cited by other articles:

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