Figure 2

Bicoherence of visual evoked EEG. Bicoherence at channel O2 plotted over the principal domain in bifrequency space computed using a 128 point window around a point in time 10ms after the presentation of a flash visual stimulus to the right eye. The sampling frequency is 200Hz. Only Bicoherence values above the 95% significance level of 0.15 are coloured and the colour bar is shown on the right. It can be noted that bicoherence is significantly high over many frequency combinations and the values appearing as brown are particularly high around 0.6. This picture can change with time.