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Neurology 2001;56:1396-1399
© 2001 American Academy of Neurology
Brief Communications

Contraversive eye deviation during deep brain stimulation of the globus pallidus internus

E. Anagnostou, MD;, B. Sporer, MD;, U. Steude, MD;, U. Kempermann, MD;, U. Büttner, MD; and K. Bötzel, MD

From the Departments of Neurology (Drs. Anagnostou, Sporer, Kempermann, Büttner, and Bötzel) and Neurosurgery (Dr. Steude), Ludwig-Maximilians University, Munich, Germany.

Address correspondence and reprint requests to the Department of Neurology, Ludwig-Maximilians University Marchioninstr. 15, 81377 Munich, Germany; e-mail: kboetzel{at}brain.nefo.med.uni-muenchen.de

Clinical signs help determine correct electrode positioning during stereotactic implantation for chronic high-frequency pallidal stimulation in Parkinson’s diease (PD). The authors describe a patient who had marked, sustained, contraversive eye deviation caused by stimulation during pallidal surgery. The underlying mechanism is probably an excitation of fibers in the internal capsule by volume-conducted current spread. Such conjugate eye deviation is thus not necessarily an indication of incorrect electrode placement.






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