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Failure of naloxone to modify electroencephalogram interictal epileptiform discharges in patients with primary generalized epilepsy after slation.

Sleep deprivation (SD) is a method widely used to activate EEG epilept oform activity, but the basis of this effect remains unknown. One possibilty is that SD shares a common mechanism with physical and psychological stresses that also precipitate seizures. Because endogenous opioids are released during stress, opioids may play a role in enhancing epileptiform EEG patterns after SD. We report the effects of SD on EEG epileptiform activity in a small but highly homogeneous population of 13 epileptic patients with idiopathic (primary) generalized epilepsy (IGE). SD increased EEG interictal epileptiform discharges (IEDs); this activation was not modified by naloxone (NAL). Our results, in contrast to those of previous investigations of localization-related epilepsy, which showed an increase in IEDs after NAL administration, suggest a possible difference in the mechanism whereby SD enhances IEDs in IGE and localization-related epilepsy.