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Abstract
This report describes results obtained when a localization technique (sLORETA) is used with less than the full amount of scalp data normally required. It is concluded that it is possible to use partial surface data in reconstructing brain activity using sLORETA, under certain conditions. In particular, when a prominent frontal asymmetry was evident, it was possible to reliably detect the asymmetry, using only four frontal channels. This approach has potential value when working clinically, as it indicates that useful frontal asymmetry data can be obtained by combining 4-channels of frontal EEG with the sLORETA technique.