Journal article
Effects of the innervation zone on the time and frequency domain parameters of the surface electromyographic signal
Journal of electromyography and kinesiology, Vol.25(4), pp.565-570
08/01/2015
DOI: 10.1016/j.jelekin.2015.04.014
PMID: 26014918
Abstract
The purposes of the present study were to examine the effects of electrode placements over, proximal, and distal to the innervation zone (IZ) on electromyographic (EMG) amplitude (RMS) and frequency (MPF) responses during: (1) a maximal voluntary isometric contraction (MVIC), and; (2) a sustained, submaximal isometric muscle action. A linear array was used to record EMG signals from the vastus lateralis over the IZ, 30 mmproximal, and 30 mm distal to the IZ during an MVIC and a sustained isometric muscle action of the leg extensors at 50% MVIC. During the MVIC, lower EMG RMS (p > 0.05) and greater EMG MPF (p < 0.05) values were recorded over the IZ compared to away from the IZ, however, no differences in slope coefficients for the EMG RMS and MPF versus time relationships over, proximal, and distal to the IZ occurred. Thus, the results of the present study indicated that during an MVIC, EMG RMS and MPF values recorded over the IZ are not comparable to those away from the IZ. However, the rates of fatigue-induced changes in EMG RMS and MPF during sustained, submaximal isometric muscle actions of the leg extensors were the same regardless of the electrode placement locations relative to the IZ. (C) 2015 Elsevier Ltd. All rights reserved.
Details
- Title: Subtitle
- Effects of the innervation zone on the time and frequency domain parameters of the surface electromyographic signal
- Creators
- Cory M. Smith - University of Nebraska–LincolnTerry J. Housh - University of Nebraska–LincolnTrent J. Herda - University of KansasJorge M. Zuniga - Creighton UniversityEric D. Ryan - University of North Carolina at Chapel HillClayton L. Camic - University of Wisconsin–La CrosseHaley C. Bergstrom - University of KentuckyDoug B. Smith - Oklahoma State UniversityJoseph P. Weir - University of KansasJoel T. Cramer - University of Nebraska–LincolnEthan C. Hill - University of Nebraska–LincolnKristen C. Cochrane - University of Nebraska–LincolnNathaniel D. M. Jenkins - University of Nebraska–LincolnRichard J. Schmidt - University of Nebraska–LincolnGlen O. Johnson - University of Nebraska–Lincoln
- Resource Type
- Journal article
- Publication Details
- Journal of electromyography and kinesiology, Vol.25(4), pp.565-570
- DOI
- 10.1016/j.jelekin.2015.04.014
- PMID
- 26014918
- NLM abbreviation
- J Electromyogr Kinesiol
- ISSN
- 1050-6411
- eISSN
- 1873-5711
- Publisher
- Elsevier
- Number of pages
- 6
- Language
- English
- Date published
- 08/01/2015
- Academic Unit
- Center for Social Science Innovation; Injury Prevention Research Center; Health, Sport, and Human Physiology
- Record Identifier
- 9984259639002771
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