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Epileptic monocular nystagmus.

Arthur C Grant1, Vivek Jain, Swaraj Bose

  • 1Department of Neurology, UCI Medical Center, Neurodiagnostic Laboratory, Orange, CA 92868, USA. grantac@uci.edu

Neurology
|November 13, 2002
PubMed
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Epileptic monocular nystagmus, a rare condition, was observed in an adult with normal vision. Focal occipital lobe seizures likely triggered abnormal eye movements.

Area of Science:

  • Neurology
  • Ophthalmology
  • Epileptology

Background:

  • Monocular nystagmus is typically associated with visual pathway abnormalities.
  • Epileptic seizures rarely manifest as isolated ocular motor disturbances.

Observation:

  • A case of a cognitively intact adult with normal vision presenting with epileptic monocular nystagmus is described.
  • The nystagmus was ipsilateral to the occipital lobe seizure focus.

Findings:

  • Focal seizures originated in the occipital lobe contralateral to the affected eye.
  • A structural lesion, possibly a forme fruste of Sturge-Weber syndrome, was identified.
  • The monocular nystagmus is hypothesized to result from seizure-induced activation of saccade regions and/or supranuclear inhibition.

Related Experiment Videos

Implications:

  • This case expands the spectrum of ocular motor manifestations of focal epilepsy.
  • It highlights the importance of considering neurological causes for isolated eye movement abnormalities.
  • Further research may elucidate the precise mechanisms linking occipital lobe seizures to monocular nystagmus.