Comparison of brain activities recorded from 170 to 240 ms between the congruent (PoSm and NeDi) and incongruent (NeSm and PoDi) conditions. Analysis by standardized Low Resolution Brain Electromagnetic Tomography (sLORETA) statistics. Light colors (red and yellow) denote enhanced brain activities in the incongruent condition (NeSm and PoDi). The identification of the wave sources disclosed that BA7 was activated significantly in the incongruent condition.