[Ambulatory long-term EEG monitors].

Ambulatory EEG monitoring is indicated in patients with attacks of uncertain origin. The method is useful to distinguish non-epileptic and epileptic attacks and to differentiate the kind of epileptic seizures which is important for the choice of antiepileptic drugs and for prognosis. It is necessary to describe in detail behaviour and seizures of patient during monitoring. EEG long term monitoring is only useful if attacks were seen frequently, at least once or twice a week.