Figure 4

Error in positioning a radial coordinate system automatically (red boxplots) or manually (blue boxplots) represented by translation errors in the left column and by rotation errors in the right column. Δx, Δϕx = translation-, rotation along the flexion-extension-axis; Δy, Δϕy, = translation-, rotation along the radioulnar deviation axis; Δz, Δϕz = translation-, rotation along the pro-supination axis; and Δtot = total translation error; Δϕtot = total rotation error. Significant differences (p < 0.05) in the accuracy (median) of RCS positioning are indicated by a star (*). Significant differences (p < 0.05) in the precision (dispersion) of RCS positioning are indicated by a hash (#).