POTENTIAL GRADIENT OF SPIKE AND WAVE TEMPORAL FOCI DETECTED BY VERTICAL DERIVATION AND NEO-ELECTROENCEPHALOGRAPHY

We studied the electrical pattern of spikes and waves and unitemporal foci by compared analysis. One analysis was obtained by two convention al derivations: longitudinal plus triangular and referential to a neck electrode ('vertical derivation'). The other analysis is quantified b y the same vertical derivation and by a monopolar-like computerized de rivation, the Neo-EEG. With Neo-EEG we obtained a differential dissoci ation of the spike-and-wave type, and a better analysis of the cerebra l dysfunction in temporal foci than in classical EEG. This leads to a sharper diagnosis of the disease it characterizes. This study also sho ws that one must be aware of the inadequacies and errors resulting fro m conventional recording because of the bipolar derivations.