Brain, as we all know, produces electrical potential. Though the voltage is often 1/millionth of a volt this can be recorded, measured and compared using sophisticated equipment. This measure is called Electroencephalography (EEG). EEG is the measurement of electrical patterns at the surface of the scalp which reflect cortical activity, and are commonly referred to as “brainwaves”. Quantitative EEG (qEEG) is the analysis of the digitized EEG, and in layman’s terms this sometimes also termed as “Brain Mapping”. The qEEG is an extension of the analysis of the visual EEG interpretation which may assist and even augment our understanding of the EEG and brain function.