Validation for tremor quantification of an electromagnetic tracking device

Research output: Contribution to journalArticle

43 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)265-271
Number of pages7
JournalMovement Disorders
Volume16
Issue number2
DOIs
StatePublished - Mar 2001

Keywords

  • Electromagnetic tracking device
  • Essential tremor
  • Parkinson's disease
  • Tremor quantification

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

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