[Paraclinical explorations in epilepsies].

Paraclinical explorations in epilepsy depend on the clinical situation of the occurrence of seizure. Epileptic seizure is first a possible symptom of a progressive cerebral disease or a systemic origin (toxic, metabolic, iatrogenic). In this situation, the aim of urgent explorations is to find the etiology of the seizure. If epileptic seizure is related to an epilepsy onset, paraclinical explorations are aimed to characterize an epileptic syndrome (idiopathic or symptomatic). Then EEG and cerebral imaging are imperative, eventually completed by specialized investigations (genetics, metabolic, functional imaging).