This paper is aimed at the understanding of epileptic patient disorders through the analysis of surface electroencephalograms (EEG). It deals with the detection of spikes or spike-waves based on a non-orthogonal wavelet transform. A multilevel structure is described which locates the temporal segments where abnormal events occur. These events are then visually interpreted by means of a 3-D mapping technique. This 3-D display makes use of a ray tracing scheme and combines both the functional (the EEG but also its wavelet representation) and the morphological data (acquired from CT or MRI devices). The results show that a significant reduction of the clinical workload is obtained while the most important episodes are better reviewed and analyzed.
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