Analysis of the directional bias of the responses to perturbations that are at an angle of 45° relative to the baseline target motion. A–C, Histograms showing the distribution of direction biases in averages from all relevant trials in the three monkeys. D–F, Direction bias plotted as a function of the direction of target motion. G–I, Direction bias plotted as a function of the direction of the perturbation. Error bars show SEs. In A–I, positive values of direction bias indicate that the response to the perturbation was biased toward the axis of ongoing target motion.