Volume 10, Issue 3 p. 318-328
Article

Statistical prediction of the optimal site for thalamotomy in parkinsonian tremor

Dr. F. A. Lenz

Corresponding Author

Dr. F. A. Lenz

Division of Neurosurgery, The Johns Hopkins Hospital, Baltimore, Maryland

Department of Neurosurgery, The Johns Hopkins Hospital, Meyer 7-113, 600 North Wolfe Street, Baltimore, MD 21287-7713, U.S.A.Search for more papers by this author
S. L. Normand

S. L. Normand

Department of Health Care Policy, Harvard Medical School, Boston, Massachusetts, U.S.A.

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H. C. Kwan

H. C. Kwan

Department of Physiology, University of Toronto, Toronto, Canada

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D. Andrews

D. Andrews

Department of Statistics, University of Toronto, Toronto, Canada

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L. H. Rowland

L. H. Rowland

Division of Neurosurgery, The Johns Hopkins Hospital, Baltimore, Maryland

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M. W. Jones

M. W. Jones

Department of Neurosurgery, State University of New York, Syracuse, New York, U.S.A.

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M. Seike

M. Seike

Division of Neurosurgery, The Johns Hopkins Hospital, Baltimore, Maryland

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Y. C. Lin

Y. C. Lin

Division of Neurosurgery, The Johns Hopkins Hospital, Baltimore, Maryland

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R. R. Tasker

R. R. Tasker

Department of Surgery, University of Toronto, Toronto, Canada

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J. O. Dostrovsky

J. O. Dostrovsky

Department of Physiology, University of Toronto, Toronto, Canada

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Y. E. Lenz

Y. E. Lenz

Division of Neurosurgery, The Johns Hopkins Hospital, Baltimore, Maryland

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First published: May 1995
Citations: 101

Abstract

Stereotactic lesions in the thalamus for treatment of parkinsonian tremor are often made at the location where neurons fire at approximately tremor frequency (tremor cells). Some of these cells show a large amount of activity at tremor frequency and are significantly correlated with electromyographic activity (EMG) during tremor. Our analysis of cellular location identifies a cluster of neurons showing activity characterized both by concentration of power at tremor frequency and by significant correlation with EMG. In a retrospective analysis of results in 15 patients, lesions placed within 2 mm of the center of this cluster were uniformly effective in relieving tremor. Therefore, a small lesion targeting this cluster is effective in treatment of parkinsonian tremor.