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. 2014 Jan 29;34(5):1806–1818. doi: 10.1523/JNEUROSCI.3095-13.2014

Figure 5.

Figure 5.

Performances of aged volunteers. A, Unimanual MVF and signal-dependent noise. B, Left plot, Signal-dependent noise for each arm, averaged across all directions. Laterality index refers to the difference between signal-dependent noise produced by the right and left arms, divided by the sum of two arms. C, Contributions of the left and right arms in bimanual control, plotted in the young RH volunteers as well as the aged. D, Left plot, Force produced by each arm, averaged over all directions. Laterality index refers to the difference between the force produced by the right and left arms, divided by the sum of forces in the two arms (Eq. 9). E, Bimanual control in the aged group and the performance of the corresponding model. F, Distribution of model parameter values. Data are mean ± SEM.