Figure 3From: Repetitive finger movement performance differs among Parkinson’s disease, Progressive Supranuclear Palsy, and spinocerebellar ataxia Amplitude and amplitude coefficient of variation. Mean and standard error for (A) normalized peak-to-peak amplitude and (B) normalized peak-to-peak amplitude coefficient of variation (CV) across all tone rates for the PD, PSP, and SCA groups.Back to article page