Three-dimensional measurement of essential tremor

Joseph Y. Matsumoto, David William Dodick, Lorna N. Stevens, Randall C. Newman, Patrick E. Caskey, Wayne Fjerstad

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

A mechanical linkage device was used to measure the three-dimensional position of the fingertip during a postural task. Thirty patients with essential tremor were tested simultaneously with the device, uniaxial accelerometry, and clinical tremor measures. Eighteen patients were tested again 16 ± 4 days later. The device accurately recorded the three-dimensional behavior of essential tremor. Measures from the device included mean three-dimensional velocity, mean three-dimensional dispersion, and power of the three-dimensional acceleration. The logarithms of these measures were strongly correlated (r = .841-.984) with all clinical measures including self-reported tremor disability. The device measures were reliable within and between testing sessions (intraclass correlation coefficients = .971-.977). The performance of the device was superior to uniaxial accelerometry, most likely as a result of the three-dimensional nature of the measurements. We conclude that essential tremor can be validly and reliably quantified during a postural task providing the recording device records movement in three dimensions and the measurements are logarithmically transformed.

Original languageEnglish (US)
Pages (from-to)288-294
Number of pages7
JournalMovement Disorders
Volume14
Issue number2
DOIs
StatePublished - 1999

Fingerprint

Essential Tremor
Equipment and Supplies
Accelerometry
Tremor

Keywords

  • Accelerometry
  • Essential tremor
  • Measurement
  • Tremor

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

Cite this

Matsumoto, J. Y., Dodick, D. W., Stevens, L. N., Newman, R. C., Caskey, P. E., & Fjerstad, W. (1999). Three-dimensional measurement of essential tremor. Movement Disorders, 14(2), 288-294. https://doi.org/10.1002/1531-8257(199903)14:2<288::AID-MDS1014>3.0.CO;2-M

Three-dimensional measurement of essential tremor. / Matsumoto, Joseph Y.; Dodick, David William; Stevens, Lorna N.; Newman, Randall C.; Caskey, Patrick E.; Fjerstad, Wayne.

In: Movement Disorders, Vol. 14, No. 2, 1999, p. 288-294.

Research output: Contribution to journalArticle

Matsumoto, JY, Dodick, DW, Stevens, LN, Newman, RC, Caskey, PE & Fjerstad, W 1999, 'Three-dimensional measurement of essential tremor', Movement Disorders, vol. 14, no. 2, pp. 288-294. https://doi.org/10.1002/1531-8257(199903)14:2<288::AID-MDS1014>3.0.CO;2-M
Matsumoto, Joseph Y. ; Dodick, David William ; Stevens, Lorna N. ; Newman, Randall C. ; Caskey, Patrick E. ; Fjerstad, Wayne. / Three-dimensional measurement of essential tremor. In: Movement Disorders. 1999 ; Vol. 14, No. 2. pp. 288-294.
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