TOPOGRAPHIC MAPPING AND CLINICAL ANALYSIS OF BENIGN CHILDHOOD EPILEPSY WITH CENTROTEMPORAL SPIKES

We studied the topographic mapping of the electroencephalography (EEG) of 47 children whose clinical history and course were compatible with typical benign childhood epilepsy with centrotemporal spikes (BCECT). Twenty-nine (62%) patients showed typical dipole fields, with a negat ive potential field in the centrotemporal region and a positive field in the frontal region. Eighteen children did not demonstrate the typic al dipole field. Their non-dipole rolandic discharges were localized i n small fields of centrotemporal region. The patients with dipole fiel ds in BCECT had significantly less frequent seizures than patients wit hout dipole fields. Twelve of the 47 patients with BCECT (26%) had mor e than one EEG focus. The clinical courses of patients with multiple f oci were not worse than those of patients with a single focus. We conc lude that EEG topographic mapping is helpful in identifying typical or atypical EEG topographic patterns in patients with clinically diagnos ed BCECT. We also conclude that the presence of dipole field usually i ndicates a better clinical course of epilepsy and multiple foci do not mean a poor clinical course. (C) 1998 Elsevier Science B.V.