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T. Niediek, DiplPsychol; H. G. Franke; R. Degen, MD; G. Ettlinger, PhD

Arch Neurol. 1990;47(4):406-411.

Abstract
• The electroencephalograms of 309 unselected epileptic patients were reexamined to ascertain the incidence of independent secondary discharges. In 41 patients (13%), a simple one-sided focus, without evidence of independent secondary discharges, was found (group 1); in 33 patients (11%), an epileptic focus with certain evidence of independent secondary discharges was found (group 2). These two groups were compared with respect to multiple variables (eg, seizure type, time course of the epileptic illness, site of foci, medication, neurological status), and significant differences between the two groups were obtained (eg, with respect to frequency of seizures, duration of seizures, number of anticonvulsive drugs being taken, and in other respects). Our findings are compared with earlier work, and it is concluded that they do not support the conventional models of secondary epileptogenesis.

Author Affiliations
From the Department of Psychology, University of Bielefeld (West Germany) (Drs Niediek, Franke, and Ettlinger), and the Electroencephalography Department, Epilepsy Center Bethel, Bielefeld, West Germany (Dr Degen). Dr Ettlinger is now with the Department of Human Sciences, Brunel University, Uxbridge, England.

Footnotes
Accepted for publication July 11, 1989.

Reprint requests to Electroencephalography Department, Mara Clinic I, Bethel, 4800 Bielefeld 13, West Germany (Dr Niediek).

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