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The Physiology of Orthostatic Tremor
P. D. Thompson, MB, FRACP;
J. C. Rothwell, PhD;
B. L. Day, PhD;
A. Berardelli, MD;
J. P. R. Dick, MB, MRCP;
T. Kachi, MD;
C. D. Marsden, MD
Arch Neurol. 1986;43(6):584-587.
Abstract
• This article describes the physiological findings in a patient with orthostatic tremor. The tremor primarily affected the legs, was alternating between antagonist muscle groups, and had a remarkably rapid frequency of 16 Hz. It was present only during certain postures and appeared to be of central origin. A tremor of the same frequency was also recorded in the arms during particular movements, but was cocontracting. We suggest that orthostatic tremor may be generated by spontaneous oscillation in those central structures responsible for organizing the motor programs for standing.
Author Affiliations
From the Department of Neurology, Institute of Psychiatry and King's College Hospital Medical School, London.
Footnotes
Accepted for publication Oct 20, 1985.
Reprint requests to Department of Neurology, Institute of Psychiatry and King's College Hospital Medical School, De Crespigny Park, London SE5 8AF, England (Dr Marsden).
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