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| Research article summary (published 30 Jul 2002): |
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A new surface electromyography analysis method to determine spread of muscle fiber conduction velocities.
Full Abstract
Muscle fiber conduction velocity (MFCV) estimation from surface signals is widely used to study muscle function, e.g., in neuromuscular disease and in fatigue studies. However, most analysis methods do not yield information about the velocity distribution of the various motor unit action potentials. We have developed a new method-the interpeak latency method (IPL)-to calculate both the mean MFCV and the spread of conduction velocities in vivo, from bipolar surface electromyogram (sEMG) during isometric contractions. sEMG was analyzed in the biceps brachii muscle in 15 young male volunteers. The motor unit action potential peaks are automatically detected with a computer program. Associated peaks are used to calculate a mean MFCV and the SD. The SD is taken as a measure of the MFCV spread. The main finding is that the IPL method can derive a measure of MFCV spread at different contraction levels. In conclusion, the IPL method provides accurate values for the MFCV and additionally gives information about the scatter of conduction velocities.
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Author information
Author/s: Lange, Fiete (F); Van Weerden, Tiemen W (TW); Van Der Hoeven, Johannes H (JH);
Affiliation: Department of Clinical Neurophysiology, University Hospital Groningen, 9700 RB Groningen, The Netherlands. f.lange(-atsign-)neuro.azg.nl
Journal and publication information
Publication Type: Clinical Trial; Journal Article
Journal: Journal of applied physiology (Bethesda, Md. : 1985) (J Appl Physiol), published in United States. (Language: eng)
Reference: 2002-Aug; vol 93 (issue 2) : pp 759-64
Dates: Created 2002/07/22; Completed 2003/02/12; Revised 2004/11/17;
PMID: 12133889, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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