Figure 3From: The effect of a concurrent cognitive task on cortical potentials evoked by unpredictable balance perturbationsAnteroposterior (AP) centre of pressure (COP) displacements of all trials in one subject during tracking (black lines) and no-tracking (gray lines) conditions. The platform acceleration of a typical trial is also shown. AP COP peak displacements involving the first (backward) peak and second (forward) peak were increased during tracking when compared to the control condition; average magnitudes of the second peak displacement were statistically different between tasks (p < 0.05).Back to article page