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Orthostatic Tremor: A Spectrum of Fast and Slow Frequencies or Distinct Entities?

Authors :
Heather B. Rigby
Matthew H. Rigby
John N. Caviness
Source :
Tremor and Other Hyperkinetic Movements, Vol 5 (2015)
Publication Year :
2015
Publisher :
Ubiquity Press, 2015.

Abstract

Background: Orthostatic tremor (OT) is defined by the presence of a high-frequency (13–18 Hz) tremor of the legs upon standing associated with a feeling of unsteadiness. However, some patients have discharge frequencies of Methods: A retrospective review was performed on all subjects with a diagnosis of OT who were referred to the Mayo Clinic, Scottsdale, AZ, between 1999 and 2013 for confirmation using neurophysiology. Results: Fourteen of 28 subjects (50%) had OT discharges of 13 Hz; p = 0.002). The proportion of subjects who experienced gait unsteadiness (85.7% vs. 66.6% vs. 21.4%; p = 0.016), falls (37.5% vs. 50% vs. 0%; p = 0.010), and had abnormal gait on examination (71.4% vs. 66.0% vs. 14.3%; p = 0.017) was greater in those with low and intermediate frequencies. Discussion: Slow tremor electromyography frequencies (

Details

Language :
English
ISSN :
21608288
Volume :
5
Database :
Directory of Open Access Journals
Journal :
Tremor and Other Hyperkinetic Movements
Publication Type :
Academic Journal
Accession number :
edsdoj.1e7b648ba51740639bf4447cd9359b88
Document Type :
article
Full Text :
https://doi.org/10.7916/D8S75FHK