[Convulsive manifestations]

The convulsive crisis (involuntary muscular contractions, tonic then clonic, associated to a sudden loss of conscience) occur on comitial persons or represent the expression of a prolonger cerebral suffering following a deficiency of one or several nutrients, necessary to the function of the nervous system (glucose, oxygen...) or an drug intoxication (local anesthetics) of the nervous centers. Following the etiology, the following aspect will be studied: the different clinical forms, the differential diagnosis, the emergency treatment of the crisis according to their possible evolution and finally their prevention.