Figure 4From: Robotic and clinical evaluation of upper limb motor performance in patients with Friedreich’s Ataxia: an observational studyMovement accuracy indices. Means of the Length Ratio (left), Lateral Deviation (middle), and Aiming Angle (right), with error bars representing standard error. The symbol ** indicates a significant difference between the two groups (p < 0.01); the symbol *** indicates a significant difference between the two groups (p < 0.001).Back to article page