Potential conflict of interest: The authors report no conflicts of interest.
What is the functional significance of nondominant arm tremor in essential tremor?†
Article first published online: 27 AUG 2010
Copyright © 2010 Movement Disorder Society
Volume 25, Issue 15, pages 2674–2678, 15 November 2010
How to Cite
Louis, E. D., Gerbin, M. and Mullaney, M. M. (2010), What is the functional significance of nondominant arm tremor in essential tremor?. Mov. Disord., 25: 2674–2678. doi: 10.1002/mds.23284
- Issue published online: 10 NOV 2010
- Article first published online: 27 AUG 2010
- Manuscript Accepted: 10 MAY 2010
- Manuscript Revised: 5 APR 2010
- Manuscript Received: 9 MAR 2010
- National Institutes of Health (Bethesda, MD). Grant Numbers: R01 NS39422, R01 NS42859
- essential tremor;
Tremor in the dominant arm is often the focus of clinical attention in essential tremor (ET) yet many daily activities require both arms. The functional relevance of nondominant arm tremor has rarely been studied. In 181 right-handed patients with ET, action tremor in each arm was rated using a clinical rating scale. Tremor disability was self-reported and a performance-based test of function was administered. Independently of tremor on the right, greater tremor severity on the left was associated with greater self-reported disability (P = 0.02) and greater performance-based dysfunction (P < 0.001). In 5.0% of patients, tremor was largely restricted to the nondominant arm. Nondominant arm tremor, independent of dominant arm tremor, had a significant functional correlate, contributing to both greater perceived and greater observable functional difficulty. In 5% of patients, tremor in the nondominant arm was the likely motivator for seeking care, which is another indication of its functional significance. © 2010 Movement Disorder Society.