Effects of the Innervation Zone on the Time and Frequency Domain Parameters of the Surface Electromyographic Signal

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 mm proximal, and 30 mm distal to the IZ during an MVIC and a sustained isometric muscle action of the leg extensors at 50% MVIC.

Source: Journal of Electromyography and Kinesiology - May 15, 2015 Category: Neurology Authors: Cory M. Smith, Terry J. Housh, Trent J. Herda, Jorge M. Zuniga, Eric D. Ryan, Clayton L. Camic, Haley C. Bergstrom, Doug B. Smith, Joseph P. Weir, Joel T. Cramer, Ethan C. Hill, Kristen C. Cochrane, Nathaniel D.M. Jenkins, Richard J. Schmidt, Glen O. John Source Type: research