Quantitative electroencephalography coherence and dipole source index during various cognitive tasks in children with attention deficit hyperactivity disorder.

Attention deficit hyperactivity disorder (ADHD) is one of the most important disorder of childhood and adolescence. Debates about diagnostic approaches requiring for the precise assessment of ADHD remains actual till nowadays. The role of neurophysiological methods for this purpose is controversial. Thus the aim of our study was to observe QEEG changes by means of the most modern software analysis systems- coherence and brainwave activity dipole source localization. We have assessed 39 children- 18 of them from control group (Age range 9-12 years). QEEG was registered during Raven test and adding of one digit numbers. The results were analyzed by means of coherence measures and brainwave bilateral synchronous activity dipole source generator localization detection system (BrainLoc. 6). As a result we observed high coherence measures for ADHD compared to controls. As for dipole source generator we have detected higher dipole equivalent index in control group compared with ADHD children. Thus according to our results it is obvious that QEEG can serve as a valid neurometric tool in the diagnosis of Attention deficit hyperactivity disorder.