Single trial timeline.

<p>The cursor was rotated by 40° or −40° in adaptation trials or by 0° in control trials. A target signaled the start of the movement, which had to be completed within 1.5 s (maximum movement time) for the trial to be valid. Feedback was provided by showing a cursor position for 0.5 s after the maximum movement time. The different tasks were cued by target colors (blue, red, and green; see <a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.1002312#sec008" target="_blank">Materials and Methods</a>).