[The use of EEG polarization in the localization of epilepsy focus]

Multiple spatio dipole structure of brain cortex has been developed to transform the traditional scalp EEG into an image of source activities. Computer use of complex calculation algorythms identify those brain regions which are active and contribute to the epileptiform discharges. The Chair and Department of Developmental Neurology at University of Medical Sciences in Poznań received a new imaging technique Focus (Megis, Germany) for testing, which allows to obtain maps of topographic EEG distribution at the instant chosen in time. Our research was based on 32-channel EEG files recorded on Ceegraph SE (Bio-Logic, USA). The purpose of the study was the comparison of traditional EEG evaluation and automatic analysis made by computer programm "FOCUS". EEG records in patients with simple partial and complex seizure were marked by a physician, electroencephalographer. Digital EEG records were also analysed by a source imaging Focus software. The best localisation of epileptic focus has been obtained in baso-mesial temporal lobe. The new technique of dipole automatic analysis is a non-invasive method providing information about seizure localisation.