Chronic depth electrode recording has proven to be a safe and indispensable tool for the investigation of intractable seizures. Anterior callosotomy appears as an excellent palliative treatment at least in bifrontal foci. It is hoped that chronic depth electrode recording will be used more widely before callosotomy in order to establish more clearly the best indication for such a surgical procedure.
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Bouvier et al. (1983) studied this question.