Figure 5. Effect of starting GVS before the movement on the net GVS-evoked response.

Superimposed traces showing the group mean net effect of the two polarities (+ and −; see Fig. 3 legend) of GVS, after subtraction of the control movement as in Fig. 3C and D, on the lateral angular velocity of the head (left traces) and trunk (right traces) in space. The movement cue was given at 0 s. GVS began either at the same time as the movement cue (upper traces) or 2 s before the cue when the body was stationary (lower traces). Note the two distinct components of the response when GVS began 2 s before the movement cue.