The effect of use of a wrist orthosis during functional activities on surface electromyography of the wrist extensors in normal subjects

W. Caroline, Stegink Jansen, Shauna L. Olson, Scott Hasson

Research output: Contribution to journalArticle

51 Citations (Scopus)

Abstract

Wrist orthoses are advocated for patients with lateral epicondylitis on the assumption that use of the orthosis decreases muscle activity of the wrist extensors during activities. The purpose of this study was to compare the amount of electrical activity, root mean square (RMS) calculated from surface EMG recorded over the wrist extensors, during activities when applying four conditions of wrist orthoses: dorsal; volar; semicircular; and no orthosis. Thirteen normal subjects (mean age 27.7 years) performed three lifting and two gripping tasks, repeated on three consecutive days under four orthotic conditions. Measured were RMS and maximum voluntary grip strength. Repeated measures ANOVA's indicated a significant decrease of RMS using the semicircular design during lifting (p < .0005). Grip strength decreased significantly using all three orthotic designs, but RMS recorded during gripping did not. It was concluded that application of a wrist orthosis reduces electrical activity of the wrist extensors less than anticipated and only during lifting.

Original languageEnglish (US)
Pages (from-to)283-289
Number of pages7
JournalJournal of Hand Therapy
Volume10
Issue number4
StatePublished - Jan 1 1997

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Orthotic Devices
Electromyography
Wrist
Hand Strength
Tennis Elbow
Analysis of Variance
Muscles

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Rehabilitation

Cite this

The effect of use of a wrist orthosis during functional activities on surface electromyography of the wrist extensors in normal subjects. / Caroline, W.; Jansen, Stegink; Olson, Shauna L.; Hasson, Scott.

In: Journal of Hand Therapy, Vol. 10, No. 4, 01.01.1997, p. 283-289.

Research output: Contribution to journalArticle

Caroline, W. ; Jansen, Stegink ; Olson, Shauna L. ; Hasson, Scott. / The effect of use of a wrist orthosis during functional activities on surface electromyography of the wrist extensors in normal subjects. In: Journal of Hand Therapy. 1997 ; Vol. 10, No. 4. pp. 283-289.
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