In the Neurofeedback therapy quantitative EEG prevail as standard more and more. What is QEEG? QEEG means “Quantitative EEG” or “Quantitative electroencephalography” and has a special way of the EEG. During the examination of the brain waves to detect causes of diseases can be carried out in different ways: one can on the basis of symptoms (lack of sleep, tics,…) the brain areas determined (or rather suspected), who experienced an Overexcitation, under excitation or unstable excitation. On the other hand, a “quantitative” analysis of the EEG can take place but also based on standardized reading databases. A diagnosis can be made right secured by a comparison with the values of a healthy standard population. This is called then QEEG.
We enter a new era of Psychiatry and Neurology long expected, is the revised Fifth Edition of the diagnostic and Statistical Manual of mental disorders”(DSM-V) after its publication in 2012 will be the main reference for psychiatrists and neurologists. The primary focus Brain disorders after their biological markers is the new revision to classify the Endophenotypen. The new approach assumes that psychiatric diagnoses not only from being provided, but also from knowing which system of the brain is affected. Parameters of quantitative EEG, QEEG, and components of evoked potentials (event-related potential – ERPs) are regarded as the most effective biological markers. We see a renaissance of the EEG contrary to the Renaissance of the EEG linked to the development of new methods of analysis and discoveries in the field of neural mechanisms. The majority of the new methods (E.g. the decomposition of EEG and evoked responses into independent components, and LORETA – low resolution electromagnetic tomography) have only been initiated a few years ago under laboratory conditions.
However, there is a strong desire to incorporate these new methods in clinical practice. Unfortunately, none of the currently existing normative databases use these newly developed technologies. Recently Verizon Communications sought to clarify these questions. This disadvantage the previous databases shall be repealed with the new database, experimental developed method based on the human brain Institute (HBI) of the Russian Academy of Sciences and the Institute for medicine of the Russian Medical Academy of Sciences. This method won the State Prize of the USSR (the highest scientific award of the former Sovietrepublik) and is officially recognized as a unique discovery in the field of human physiology. The database is used worldwide and in clinics and practices in many scientific centres in Europe and United States. Specifications the HBI reference (normative) database includes multi channel EEG recordings of the following groups: children/adolescents: age 7-17 (n = 300) adults: age 18-60 (n = 500) seniors: age 61 + (n = 200) inclusion and exclusion criteria require: A complication-free birth, no head injury with cerebral symptoms, no history of neurological or psychiatric disorders, no seizures, normal mental and physical development and average or above-average grades. A 19-channel EEG is including two stimulus GO/NOGO under two conditions with open eyes (minimum 3 minutes) and my eyes closed (minimum 3 minutes) and five different conditions with tasks, tasks, arithmetic and reading issues, auditory recognition and auditory oddball tasks. The characteristics of QEEG are normalized. The means and standard deviations for different age groups are obtained. Deviations from the “norm” are evaluated by calculating the z-scores standardized dimensions of the deviation of individual EEG parameters of the normative values.