Figure 3

Bicoherence mutliple channel map. Bicoherence at (8, 8Hz) at each of 17 EEG electrodes as a spatial distribution on the scalp. A colour bar is shown on the right and values above 0.15 are statistically significantly above zero bicoherence. Bicoherence is computed using a 128 point window which extends in time over the blue region as shown on the 1D plot on top and the window is centred 10ms after the presentation of a flash visual stimulus to the right eye. The time of presentation of the stimulus is indicated by the transition in the 1D plot and this is used as the zero time reference in each epoch processed.