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Neurology 2000;54:1997-1999
© 2000 American Academy of Neurology
Brief Communications

Selective loss of vergence control secondary to bilateral paramedian thalamic infarction

Gerald Wiest, MD, Reinhold Mallek, MD and Christoph Baumgartner, MD

From the Departments of Neurology (Drs. Wiest and Baumgartner) and Radiology (Dr. Mallek), University of Vienna, Austria.

Address correspondence and reprint requests to Dr. Gerald Wiest, Reed Neurological Research Center, Department of Neurology, UCLA School of Medicine, Westwood Plaza, Rm C-246A, Los Angeles, CA 90095-1769.

The supranuclear pathways for vergence eye movements are poorly understood. The authors report a 57-year-old patient who presented with selective loss of vergence control and dissociation of light and near reaction. MRI showed a symmetric paramedian thalamic infarction without midbrain lesion. The findings suggest that this syndrome is due to an interruption of supranuclear fibers to midbrain vergence neurons.

Key words: Vergence eye movements—Paramedian thalamus—Infarction.




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