FIG. 6.

Activation maps demonstrating the timing effect. Figure 6a-6c shows the dephasing effects for the 80ms latency component, early components and the control scan acquired before stimulation. Significant activation was found in S1 area in figure 6a, but was not found in figure 6b or 6c. The absence in 6b is probably due to a cancellation effect as discussed in the text. The absence in 6c is expected because the stimulus had not been applied when the data were acquired.