Figure 1
![Figure 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1758-2555-2-17/MediaObjects/13102_2010_Article_45_Fig1_HTML.jpg)
Electrode placements for the posterior, middle and anterior subdivisions of gluteus medius. X marks the landmarks use to locate the electrodes; ASIS, iliac crest, greater trochanter, and the posterior ilium. The posterior ilium landmark used was 20% of the distance between the iliac crest and L4-L5 interspace.