This book brings together the exciting new findings that will bring us closer to a better understanding of the alterations of neuronal connectivity in autistic brains. This volume authoritatively covers the epidemiology, physiology, neurodevelopment, genetics, environmental influences, imaging studies, neuroanatomy, and neurochemistry of autism spectrum disorders. While the neurobiology of autism is still a long way from being understood, this book posits techniques, such as using brain imaging to find signatures in early days of life, that could help move the diagnosis and help identify neural pathways. Understanding these mechanisms opens the possibility to pharmacological, behavioral, and psychosocial therapeutic interventions. With contributions from the leading international autism researchers, is the go-to reference for researchers and clinicians with an interest in understanding the underlying neurobiology of autism spectrum disorders.