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. Author manuscript; available in PMC: 2013 Apr 21.
Published in final edited form as: Exp Brain Res. 2009 Dec 24;202(1):189–202. doi: 10.1007/s00221-009-2126-5

Fig. 9.

Fig. 9

Prediction of the change of endpoint error and endpoint variance for 80% relative to 20% MVC of the fast contractions. Each open circle in the two panels represents that data from one subject. a Stepwise, multiple linear regression analysis indicated that the change (increase) in endpoint error from 20 to 80% MVC target force was predicted (R2 = 0.65; adjusted R2 = 0.6; P < 0.001) by the difference in the SD of the time to peak EMG for FDI (part r = 0.85). b Stepwise, multiple linear regression analysis indicated that the change (decrease) in endpoint variance from 20 to 80% MVC target force was predicted (R2 = 0. 54; adjusted R2 = 0.49; P = 0.003) by the difference in the SD of the FDI peak EMG (part r = 0.78) and the change in the variability of the time delay between the FDI peak EMG relative to the peak force (part r = 0.73)