Autism spectrum disorder (ASD) and Alzheimer’s disease (AD) are two significant neurological disorders, which represent the scope of this book. Both ASD and AD effect a significant number of the population and present themselves in numerous ways. This volume covers the state-of-the-art topics that investigate these two significant neurological disorders, not only from the theoretical perspective but also focuses on the practical aspects. The materials are presented in a way that can be beneficial to both advanced and layman readers. Several state-of-the-art machine learning techniques for the early diagnosis of ASD are presented in this book. Also, various studies are discussed to demonstrate the formation, cause, and medical treatments for the AD foetal disorder.