On the other hand, the topographic maps of both ORN and ORP, derived from the waveforms filtered at 2.0–16.0 Hz and 0.25–16.0, respectively, showed significant group as well as condition differences. The loss conditions had anterior maxima while the gain conditions had posterior maxima, especially for the ORN component. Alcoholics showed decreased amplitude in both ORN and ORP components in all conditions. While the amplitude differences were robust, topographic differences were not prominent.
