The Quantitative Electroencephalography or QEEG (a method within brain mapping techniques) consists of applying mathematical methods to the EEG data, mainly power spectral analyses, to obtain quantitative metrics that are associated with behavioral-cognitive brain funcitons. The electroencephalogram (EEG) records human brain electrical activity by electrodes placed over the surface of the scalp, which reflects underlying cortical activity, commonly referred to as “brain waves” ( Niedermeyer, 2005). In the next post we will define a QEEG brain mapping and a normative database, describe how to interpret it along with the most reliable electrophysiological markers to date, and the main steps and tools so that the reader can obtain a general idea of the procedure. When an individual’s QEEG is compared to a normative database representing the general population (denoted QEEG normative database), the result can be used as a diagnostic tool in clinical practice for certain disorders such as ADHD, schizophrenia, major depression, and obsessive-compulsive disorder, among others. Quantitative electroencephalogram (QEEG) is the mathematical analysis of the brain’s electrical activity, mainly power spectral analyses, to obtain metrics that may be associated with behavioral-cognitive function.
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