Relative surface area of the reachable workspace envelope as measured in the healthy controls and patients with different neuromuscular diseases (See <b>Tables 1</b> and <b>2</b> for details and corresponding absolute values).

<p>Relative surface area of the reachable workspace envelope as measured in the healthy controls and patients with different neuromuscular diseases (See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0045341#pone-0045341-t001" target="_blank"><b>Tables 1</b></a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0045341#pone-0045341-t002" target="_blank"><b>2</b></a> for details and corresponding absolute values).</p

Patient data and corresponding results of the surface envelope assessment are presented as the average value over three trials.

*<p>BMD: Becker muscular dystrophy; DMD: Duchenne muscular dystrophy; FSHD: Facioscapulohumeral dystrophy; Pompe: Pompe disease (glycogen storage disease type II).</p

Relative contribution of each quadrant surface to the overall surface area of the reachable workspace envelope as assessed in the group of healthy controls.

<p>Relative contribution of each quadrant surface to the overall surface area of the reachable workspace envelope as assessed in the group of healthy controls.</p

Data of healthy subjects and their corresponding mean and standard deviation results of the surface envelope assessment are presented for the gender based grouping and as combined total.

<p>Data of healthy subjects and their corresponding mean and standard deviation results of the surface envelope assessment are presented for the gender based grouping and as combined total.</p

Three-dimensional hand trajectory is projected to spherical coordinates and a spherical surface is fitted to obtain the reachable workspace envelope in 3D space.

<p>The surface area is divided and analyzed for each of the four quadrants. Different projections are presented for each subject. The figure shows results in a healthy subject (A), the patients with the following diagnoses: (B) Becker Muscular Dystrophy (BMD), (C) Duchene Muscular Dystrophy (DMD), (D) mild and (E) severe of Facioscapulohumeral muscular dystrophy (FSHD), and (F) advanced Pompe Disease.</p

(A) Example of measured three-dimensional hand location as measured by the commercial motion capture system and stereo triangulation algorithm in a healthy individual.

<p>(B) Comparison of relative workspace percentiles measured by motion capture vs. stereo camera system for each respective quadrants in healthy individuals.</p

Application of markers on the body landmarks and the corresponding quadrant notation for the left and right arm (Roman numerals in the parentheses are for the right arm).

<p>Application of markers on the body landmarks and the corresponding quadrant notation for the left and right arm (Roman numerals in the parentheses are for the right arm).</p