Abstract
The definitions and physiological implications of the classical amplitude (average rectified value or root mean square) and spectral features (mean or median frequency) of a single EMG channel are introduced together with the concepts of Fourier analysis and the spectrum of a signal. The spatial distribution of these quantities along an electrode array placed above the muscle is discussed. In addition, the importance of deriving these quantities from the sEMG signal collected from an area away from the innervation zone of the muscle is explained.
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Beck TW, Housh TJ, Mielke M et al (2007) The influence of electrode placement over the innervation zone on electromyographic amplitude and mean power frequency versus isokinetic torque relationships. J Neurosci Meth 162:72–83
Beck TW, Housh TJ, Cramer, JT, Weir JP (2008) The effects of electrode placement and innervation zone location on the electromyographic amplitude and mean power frequency versus isometric torque relationships for the vastus lateralis muscle. J Electromyogr Kinesiol 18:317–328
Beck TW, Housh TJ, Cramer JT et al (2009) Electrode placement over the innervation zone affects the low, not the high-frequency portion of the EMG frequency spectrum. J Electromyogr Kinesiol 19:660–666
De Luca CJ (1984) Myoelectrical manifestations of localized muscular fatigue in humans. Crit Rev Biomed Eng 11:251–279
Farina D, Cescon C, Merletti R (2002a) Influence of anatomical, physical, and detection-system parameters on surface EMG. Biol Cybern. 86:445–56
Farina D, Madeline P, Graven-Nielsen T et al (2002b) Standardising surface electromyogram recordings for assessment of activity and fatigue in the human upper trapezius muscle. Eur J Appl Physiol 86:469–478
Farina D, Kallenberg LA, Merletti R, Hermens HJ (2003) Effect of side dominance on myoelectric manifestations of muscle fatigue in the human upper trapezius muscle. Eur J Appl Physiol 90:480–488
Hermens HJ, Freriks B (1997) SENIAM 5: The State of the Art on Sensors and Sensor Placement Procedures for Surface ElectroMyoGraphy: A proposal for sensor placement procedures. Roessingh Research and Development, Enschede, NL
Kallenberg LA, Schulte E, Disselhorst-Klug C, Hermens HJ (2007) Myoelectric manifestations of fatigue at low contraction levels in subjects with and without chronic pain. J Electromyogr Kinesiol 17:264–274
Karlsson S, Roeleveld K, Gronlund C et al (2009) Signal processing of the surface electromyogram to gain insight into neuromuscular physiology. Philos Transact A Math Phys Eng Sci 367:337–356
Kupa EJ, Roy SH, Kandarian SC, De Luca CJ (1995) Effects of muscle fiber type and size on EMG median frequency and conduction velocity. J Appl Physiol 79:23–32
Mannion AF, Dumas GA, Stevenson JM, Cooper RG (1998) The influence of muscle fiber size and type distribution on electromyographic measures of back muscle fatigability. Spine 23:576–584
Rainoldi A, Falla D, Mellor R et al (2008) Myoelectric manifestations of fatigue in vastus lateralis, medialis obliquus and medialis longus muscles. J Electromyogr Kinesiol 18:1032–1037
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© 2012 Springer-Verlag Italia
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Barbero, M., Merletti, R., Rainoldi, A. (2012). Features of the Single-Channel sEMG Signal. In: Atlas of Muscle Innervation Zones. Springer, Milano. https://doi.org/10.1007/978-88-470-2463-2_5
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DOI: https://doi.org/10.1007/978-88-470-2463-2_5
Publisher Name: Springer, Milano
Print ISBN: 978-88-470-2462-5
Online ISBN: 978-88-470-2463-2
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