Depth EEG studies in a patient with fourteen and six per second positive spikes

Report of an 18-year-old patient with minor seizures, rare grand mal and recent personality change. Nine EEG studies with combined depth and scalp recording revealed 14 and 6/sec positive spikes. This pattern was seen at different levels, especially in the thalamo-capsular region and in the neighborhood of the putamen. However, the polarity of the deep “14 and 6” bursts was equivocal in the depth while unequivocal positivity was seen in the scalp recording.