Figure 6
Group mean PR VEP. Responses to reversal stimulation averaged over two repetitions; all subjects are shown by the blue, black, and red curves for the LED, CRT, and LCD stimulators, respectively. The semitransparent patches under curves depicts 95% CI for the VEPs. PR 30′ VEPs are grouped on the right and PR15′ VEPs on the left side of the figure. At the top of the figure (A), the PR VEPs are aligned to the onset of reversal of each stimulus detected in the upper left corner of the stimulated area. This instant is marked as "0". In the lower part of the figure (B), the same PR VEPs are aligned to the P100 peak. Note the low amplitude noise for the black curves. This noise was created by the electromagnetic field of the CRT monitor at its frame rate (60 Hz).
