@article{ref1,
title="Optimal task-dependent changes of bimanual feedback control and adaptation",
journal="Current biology",
year="2007",
author="Diedrichsen, Jorn",
volume="17",
number="19",
pages="1675-1679",
abstract="The control and adaptation of bimanual movements is often considered to be a function of a fixed set of mechanisms [1, 2]. Here, I show that both feedback control and adaptation change optimally with task goals. Participants reached with two hands to two separate spatial targets (two-cursor condition) or used the same bimanual movements to move a cursor presented at the spatial average location of the two hands to a single target (one-cursor condition). A force field was randomly applied to one of the hands. In the two-cursor condition, online corrections occurred only on the perturbed hand, whereas the other movement was controlled independently. In the one-cursor condition, online correction could be detected on both hands as early as 190 ms after the start. These changes can be shown to be optimal in respect to a simple task-dependent cost function [3]. Adaptation, the influence of a perturbation onto the next movement, also depended on task goals. In the two-cursor condition, only the perturbed hand adapted to a force perturbation [2], whereas in the one-cursor condition, both hands adapted. These findings demonstrate that the central nervous system changes bimanual feedback control and adaptation optimally according to the current task requirements.<p /><p>Language: en</p>",
language="en",
issn="0960-9822",
doi="10.1016/j.cub.2007.08.051",
url="http://dx.doi.org/10.1016/j.cub.2007.08.051"
}