Fig. 2From: Principal component analysis for ataxic gait using a triaxial accelerometerThe chronological change of the first and second principal component scores. a The change of the first principal component scores. b The change of the second principal component scores. The bars show the 95% confidence intervals. The number of subjects in each group was 18 in the controls, 2 in SCA6, 8 in SCA31, and 5 in MSA-CBack to article page