Document Detail

Validation for tremor quantification of an electromagnetic tracking device.
MedLine Citation:
PMID:  11295779     Owner:  NLM     Status:  MEDLINE    
An electromagnetic tracking system was used to record arm motion in subjects with Parkinson's disease (n = 23), essential tremor (n = 28) or without neurological disease (n = 4). Tremor magnitude was calculated by averaging the three-dimensional displacement of individual tremor bursts. Tremor magnitude calculated in this manner was quite closely correlated with a clinician's estimate (r = 0.88 and 0.86 for Parkinsonian and essential tremors, respectively) and was reproducible (r = 0.93 for repeated recordings). The accuracy of the device and algorithm was confirmed by mechanically generating oscillations of known magnitudes and frequencies. This device is adaptable for quantifying different types of tremors and its accuracy is easy to verify. Because position rather than acceleration is tracked, tremor amplitude can be stated in readily comprehensible units.
P E O'Suilleabhain; R B Dewey
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Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  Movement disorders : official journal of the Movement Disorder Society     Volume:  16     ISSN:  0885-3185     ISO Abbreviation:  Mov. Disord.     Publication Date:  2001 Mar 
Date Detail:
Created Date:  2001-04-11     Completed Date:  2001-08-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  8610688     Medline TA:  Mov Disord     Country:  United States    
Other Details:
Languages:  eng     Pagination:  265-71     Citation Subset:  IM    
Copyright Information:
Copyright 2001 Movement Disorder Society.
Department of Neurology, University of Texas Southwestern Medical Center, Dallas, Texas 75390-9036, USA.
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MeSH Terms
Aged, 80 and over
Electromagnetic Phenomena / instrumentation,  methods
Equipment Design
Middle Aged
Parkinson Disease / complications
Severity of Illness Index
Tremor / diagnosis*,  etiology

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