EEG findings and language patterns in autistic children: clinical correlations.

Several authors have used the EEG as a diagnostic tool to identify distinctive patterns of cerebral dysfunction in autistic children. However, evidence is needed to support the hypothesis that their level of functioning correlates with their EEG profile. In this study EEG's were obtained in 17 autistic children without sedation and following sleep deprivation. These children were also evaluated in a double blind procedure with regard to their speech and communication abilities. We did not find a statistically significant correlation between EEG changes and speech performance. None of the autistic children using an augmentative system of communication had any EEG abnormalities. However, a normal EEG is not sufficient to predict successful response to communication therapy. Since the effect of sedative drugs on brain electrical activity limits the value of tracings, we recommend the sleep deprivation techniques when "difficult" children have to undergo EEG testing. Parents' or guardians' participation during the procedure is encouraged.