Figure 5From: Augmented visual feedback counteracts the effects of surface muscular functional electrical stimulation on physiological tremorEffects of FES on wrist stiffness in a single subject. Stiffness is measured using a mechatronic haptic unit imposing slow extensions of the wrist (20 extensions at baseline and 20 extensions during FES). Individual values (open circles) and means (filled circles; +/- SD) are illustrated. Wrist stiffness is expressed in Nm/rad.Back to article page