[The biophysical foundations of the localisation of encephalogram generators in the brain. The application of a distribution-type model to the localisation of epileptic foci]
- PMID: 15514904
[The biophysical foundations of the localisation of encephalogram generators in the brain. The application of a distribution-type model to the localisation of epileptic foci]
Abstract
Introduction: The brain electrical activity measured as the EEG signal is a powerful tool for the understanding of normal and pathological brain function. The EEG presents a high temporal resolution but a low spatial resolution. The latter can be improved solving the so-called inverse problem, if some a priori physiological and anatomical information is included.
Development: The present review presents the biophysical bases that allows brain source localization in realistic head models, as well as the two basic source models used: dipolar models and distributed source models. Finally, an example of practical application for the localization of epileptic focus using the distributed solution EPIFOCUS will be presented.
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