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Frequency domain activity associated with perception of the sound induced illusory flash in the SEE subject group. A, Time–frequency representation of the total average spectral amplitude on SEE trials, NO-SEE trials, and the SEE–NO-SEE trial difference from an occipital electrode (O2). B, Spatial topography maps of the two time–frequency blocks of differential spectral amplitude, EP130 and EP220, found in the SEE–NO-SEE trial difference shown in back view.
