This book traces the progress of psychiatry as a discipline and highlights some of its key concepts and applications. It presents researches and studies performed by experts across the globe. Mental health issues are generally affective or behavioral. Psychiatry aims to study, diagnose and treat usual as well as rare mental disorders. It is a field of medicine which encompasses subfields such as geriatric psychiatry, child adolescent psychiatry, forensic psychiatry, addiction psychiatry, clinical neurophysiology, etc. This book will provide interesting topics for research which readers can take up. It includes some of the vital pieces of work being conducted across the world, on various aspects related to psychiatry. This book is appropriate for students seeking detailed information in this area as well as for experts. The extensive content of this book provides readers with a thorough understanding of this subject.