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Neurology 2003;61:548-550
© 2003 American Academy of Neurology
Brief Communications

Accelerometry to distinguish psychogenic from essential or parkinsonian tremor

K. E. Zeuner, MD, R. O. Shoge, S. R. Goldstein, MD, J. M. Dambrosia, PhD and M. Hallett, MD

From the Human Motor Control Section, Medical Neurology Branch (Drs. Zeuner, Goldstein, and Hallett, and R.O. Shoge) and Biostatistics Branch (Dr. Dambrosia), National Institute of Neurological Disorders and Stroke, Bethesda, MD.

Address correspondence and reprint requests to Dr. M. Hallett, NINDS, NIH, 10 Center Dr., Bldg. 10, Rm. 5N226, MSC1428, Bethesda, MD 20892-1428; e-mail: hallettm{at}ninds.nih.gov

The authors measured postural wrist tremor with accelerometry in patients with psychogenic (n = 6), essential (n = 11), and parkinsonian (n = 12) tremor. Tremor was measured in one hand, while the other hand either rested or tapped to an auditory stimulus at 3 and 4 or 5 Hz. Psychogenic tremors showed larger tremor frequency changes and higher intraindividual variability while tapping. Accelerometry may differentiate psychogenic from essential and parkinsonian tremor.




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