<abstract xmlns="http://www.w3.org/1999/xhtml"><p>This study has investigated the relationship in the connectivity of motor units in surface electromyogram (sEMG) of biceps brachii muscle. It is hypothesized that with ageing, there is reduction/loss in number of motor units, leading to reduction in the independence between the channels of the recorded muscle activity. Two channels of sEMG were recorded during three levels of isometric muscle contraction: 50 %, 75 % and 100 % maximal voluntary contraction (MVC). 73 subjects (age range 20-70) participated in the experiments. The independence in channel index (ICI) between the two sEMG recording locations was computed using the independent components and Frobenius norm. ANOVA Statistical analysis was performed to test the effect of age (loss of motor units) and level of contraction on ICI. The results show that the ICI among the older cohort was significantly lower compared with the younger adults. This research study has shown that the reduction in number of motor units is reflected by the reduction in the ICI of the sEMG signal.</p></abstract>

This study has investigated the relationship in the connectivity of motor units in surface electromyogram (sEMG) of biceps brachii muscle. It is hypothesized that with ageing, there is reduction/loss in number of motor units, leading to reduction in the independence between the channels of the recorded muscle activity. Two channels of sEMG were recorded during three levels of isometric muscle contraction: 50 %, 75 % and 100 % maximal voluntary contraction (MVC). 73 subjects (age range 20-70) participated in the experiments. The independence in channel index (ICI) between the two sEMG recording locations was computed using the independent components and Frobenius norm. ANOVA Statistical analysis was performed to test the effect of age (loss of motor units) and level of contraction on ICI. The results show that the ICI among the older cohort was significantly lower compared with the younger adults. This research study has shown that the reduction in number of motor units is reflected by the reduction in the ICI of the sEMG signal.

Independence Between Two Channels of Surface Electromyogram Signal to Measure the Loss of Motor Units

Bio-signals Lab, School of Electrical and Computer Engineering, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia

Faculty of Engineering and Information Technology (FEIT), University of Technology Sydney (UTS), Sydney - 2007, Australia.

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

This study has investigated the relationship in the connectivity of motor units in surface electromyogram (sEMG) of biceps brachii muscle. It is hypothesized...

Independence Between Two Channels of Surface Electromyogram Signal to Measure the Loss of Motor Units

Published Online: Jul 10, 2015

Page range: 152 - 155

Received: Oct 20, 2014

Accepted: Jun 24, 2015

DOI: https://doi.org/10.1515/msr-2015-0022

Keywords
Independence, motor units, surface electromyogram, control

© Sridhar P. Arjunan et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Independence Between Two Channels of Surface Electromyogram Signal to Measure the Loss of Motor Units

Published Online: Jul 10, 2015

Page range: 152 - 155

Received: Oct 20, 2014

Accepted: Jun 24, 2015

DOI: https://doi.org/10.1515/msr-2015-0022

KeywordsIndependence, motor units, surface electromyogram, control

© Sridhar P. Arjunan et al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Independence, motor units, surface electromyogram, control