This book provides encyclopedic information regarding the Autism Spectrum Disorders (ASD). There are many researches currently being conducted in the field of autism spectrum disorders. Hence, keeping up with all the current happenings in this field is a challenging task. Therefore, this book has been compiled with the objective of providing readers with all the latest information and developments in this field. It covers topics on the evolutionary aspects of autism and emphasizes on the social attitude towards autism including the stigma issue. It further discusses electrophysiology and cortical modularity and also discusses treatment issues such as medical, sensory and community-based interventions. Additionally, it also presents an account on forensic issues and highlights the importance of built environment. This book will serve as a valuable reference for pediatricians, occupational therapists, psychologists, psychiatrists and care workers.