Abstract: Quantitative EEG (QEEG) analysis techniques can provide additional measurements or displays of digital EEG signals. Several QEEG techniques commonly called EEG Brain Mapping include topographic displays of voltage or frequency. Many technical and clinical problems interfere with simple clinical application. Traditional EEG artifacts can appear in unusual and surprising ways, and new artifacts can be caused by the data processing algorithms. A brain map based on EEG signals shows the potential distribution over the entire scalp. Abnormal activity such as epileptic form spikes or sharp waves may be overlooked,