Early somatosensory (SEP) and auditory (BAEP) evoked potentials, when recorded within the first seven days of the course of anoxic coma, appear to be reliable to evaluate anoxic ischemic cortical or under-cortical lesions. Prognosis depends especially on cortical SEP (N20-P25): the lack of SEP is a good outcome predictor of death (abnormal BAEP) or of vegetative status (normal BAEP); the presence of normal and bilateral cortical SEP (with normal BAEP) allows to predict awakening, without prejudging of neurologic sequelae, even if they are severe.