Figure 5. Extent of propagation versus Origin Location.

For the extent of propagation, contrasts between Origin Location areas have been done. On the left, the extent of propagation grand-average map is depicted. In order to obtain a map related to the Origin Location effect, events originating from each origin site (electrode) have been selected and the grand-mean of extent of propagation per electrode has been derived. On the right, the contrast results are graphically reported by a grayscale code. Each step in the grayscale indicates a significant difference (p<0.01) between contiguous tones. The grayscale is ordinal, namely lighter tones correspond to higher extent of propagation values.