Abstract: In the study of brain structure of autism, an important conclusion has recently been drawn that the brain of autism overgrows in their early life compared with normal individual. Further, It has been revealed that the brain overgrowth is primarily due to the abnormality in white matter. Moreover, it has been found that the overgorwth is more obvious in the later developmenting cerebral areas mediating higher-order functions. As a result, the finding can be applied to the early identification of autism. In addition, it also can be deduced that autism is not attributed to localized neurological abnormalities. Actually, there may be a distributed neurological disorder in autism

Key words: autism, brain over growth, early identification, distributed neurological disorder