We have analyzed morphologic and chronologic characteristics of epileptiform activity, with account for repeated EEG-study during the follow-up, in patients with periventricular leukomalacia and children cerebral palsy without epilepsy. The high frequency of "benign epileptiform patterns of childhood" (BEPC) was noted. The epileptiform activity recorded by chronologic criteria corresponded to BEPC in 67% of children. The high probability of epileptiform activity of symptomatic character was identified in 33% of children. The results obtained in this study of the parameters of epileptiform activity could be of great importance for predicting the risk for the development of epilepsy and tactics of rehabilitation of motor disorders.