Disorders of neuronal migration are causes of mental handicap, autism, and epilepsy. This book addresses the various aspects of neuronal migration disorders in an ordered way, to help the clinician to aquire insight and proficiency in diagnosis. Individual chapters describe subgroups including: lissencephalies, subependymal heterotopia, non-lissencephalic cortical dysplasias, anomalies of the corpus callosum, hemimegalencephaly, schizencephaly, polymicrogyria and multisystem disorders with impaired migration (such as chromosomal and metabolic syndromes). Neuroradiological and genetic data are provided.