Quantitative EEG (QEEG) EEG is the sum of many brain waves, like this: EEG can be de-convoluted to find and measure the underlying components, e.g.: Frequency (Hz) 0 scidavis.sourceforge.net/manual/c4166.html newsoffice.mit.edu/2012/faster- fourier-transforms-0118 QEEG data can be looked at many ways, For example: http://simetronsac.com/dx_eeg2.php