Fig. 5From: Comparison of erector spinae fatigability between female patients with Parkinson’s disease and healthy individuals: a cross sectional pilot studyChanges over time in median frequency on the side on which the symptoms first appeared in a 76-year-old Parkinson’s disease patient (A), on the opposite side of the same patient (B), and on the left side of a 65-year-old healthy older woman (C)Back to article page