Cz

    -12 Difference waves

    -10 IBC

    -8 FBC

    -200 ms to 800 ms -6

    -4

    -2 ms S -0.2 0.5 1.0 1.5 2.0 2.5 3.0 3.5 -200 0 200 800 400 600 2

    4

    µV

    -5.0 0 5.0 ;V 400-500 ms 300-400 ms 500-600 ms Fig.4. Left: Grand average ERP to IBC, FBC and the difference wave (IBC-FBC) at Cz. Topographical maps of the voltage amplitudes for the IBC vs. FBC difference wave in the time windows of 300-400 ms, 400-500 ms and 500-600 ms. Right: The amplitudes figure

    between –200 ms to 800 ms of the grand average ERP.