Comparison between the MedianLC and the log of the MSJ ratio across different movement speeds and SIAS scores. The boxplots in panels A and B show the median (central marks), the quartiles (edges of the boxes), and the most extreme data points (whiskers) of the MedianLC (Panel A), or the log of MSJ ratio (Panel B) from three different movement speeds (fast, comfortable, and slow) for 11 healthy arm (including three unaffected arm of patients 14, 15, and 16). Magenta diamonds in panels A and B denotes the MedianLC or the log of MSJ ratio from mimicking movements for three healthy participants. Red, blue, and green thick and dotted lines in panels A and B denotes median (thick lines) and quartile (dotted lines) of MedianL from both initial and final measurements in Experiment 1 whose SIAS scores were 2, 3, and 4, respectively. Panel C plots the log of the MSJ ratio against the MedianLC. Magenta triangles denote data from three different movement speeds for 11 healthy arms. Red, blue, and green open circles denote data from initial and final measurements in Experiment 1 where the SIAS scores were 2, 3, and 4. The red filled triangles, green filled circles and green filled squares denote data from three movement speeds for the affected arm of P14 (SIAS score 2), P15 (SIAS score 4), and P16 (SIAS score 4) respectively. The dash dot line shows linear fitting of the data represented by the magenta triangles. The dashed line shows linear fitting of the data represented by the open circles.