Quantitative electroencephalography (quantitative EEG) is a brain mapping technique that measures brain activity. It does so by analyzing brain wave patterns and thought processes. This technology allows mental health professionals to accurately diagnose and treat mental health disorders with quantitative data. The Background of Quantitative EEG Hans Berger was the first scientist to use quantitative EEG brain mapping on a human in 1929. In the mid 20th century Ross Adey led a group of researchers at the University of California, Los