. 2013 Jun 7;10:50. doi: 10.1186/1743-0003-10-50
Copyright © 2013 Kumar et al.; licensee BioMed Central Ltd.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 3.
Example of the background and the muscle activity.