Experimental block design. Each condition consisted of an initial rest period of 30 s, followed by 10 stimulation periods (20 s) alternated with rest periods (30 s). Each condition lasted 530 s (8 min 50 s); the total duration of the experiment was approx. 35 min per subject.
Holper et al. Journal of NeuroEngineering and Rehabilitation 2010 7:57 doi:10.1186/1743-0003-7-57