Electro and acoustic myography for noninvasive assessment of lumbar paraspinal muscle function

Lee, Darryl J., Stokes, Maria J., Taylor, Robert J. and Cooper, Robert G. (1992) Electro and acoustic myography for noninvasive assessment of lumbar paraspinal muscle function. European Journal of Applied Physiology and Occupational Physiology, 64 3: 199-203. doi:10.1007/BF00626281

Author Lee, Darryl J.
Stokes, Maria J.
Taylor, Robert J.
Cooper, Robert G.
Title Electro and acoustic myography for noninvasive assessment of lumbar paraspinal muscle function
Journal name European Journal of Applied Physiology and Occupational Physiology   Check publisher's open access policy
ISSN 0301-5548
Publication date 1992-05-01
Sub-type Article (original research)
DOI 10.1007/BF00626281
Open Access Status Not yet assessed
Volume 64
Issue 3
Start page 199
End page 203
Total pages 5
Publisher Springer-Verlag
Language eng
Subject 1314 Physiology
2739 Public Health, Environmental and Occupational Health
Abstract In 31 normal subjects (17 male), aged 19-48 years, and 8 patients with chronic low back pain (4 male), aged 37-55 years, the repeatability of surface recordings of acoustic myography (AMG) and electromyography (EMG) were examined in the lumbar paraspinal muscles. Five isometric test positions were examined. In 21 of the normal subjects, four positions tested were: quiet standing, half extension from prone lying, full extension from prone with and without resistance. In 10 of the normal subjects and the 8 back pain patients, a standardised, unsupported horizontal position with the upper body over the end of a couch was tested. The AMG and EMG signals were full-wave rectified and integrated (iAMG and iEMG). The variability of recordings during repeated 5-s isometric contractions was assessed by analysis of variance (ANOVA) and the coefficient of variation (CV) was calculated from the ANOVA. Both recording techniques produced the most repeatable results during the unsupported, horizontal hold position. In the normal subjects, CV were, iAMG 5.6%, iEMG 4.9%; and in the patients, iAMG 4.4%, iEMG 2.6%. The CV for the other four isometric test positions ranged from 15.3% to 29.4% for iAMG, and 8% to 15.7% for iEMG. These results demonstrated that a controlled test manoeuvre for examining AMG and EMG of the paraspinal muscles was vital for repeatable recordings. The CV for the standardised, horizontal position were lower than for previously published results. This position therefore would appear to be suitable for physiological studies of AMG and EMG activity of the paraspinal muscles in normal subjects and patients with chronic low back pain.
Keyword Acoustic myography
Back pain
Muscle activity
Paraspinal muscles
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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Created: Fri, 15 Dec 2017, 04:44:10 EST