The successor to "Biological Bases of Psychiatric Disorders", this textbook offers students a solid account of the rapidly developing areas of neuroscience that are essential to understanding major behavioural disorders. The textbook progresses from basic neurobiological mechanisms to theories about pathophysiological mechanisms underlying psychiatric and neurological disorders and available pharmacological therapies. It explores the relationships among brain function, behaviour, and behavioural disorders and emphasizes integration across disciplines from basic neurobiology to clinical neuroscience. It also provides an introduction to the principal disciplines of neurobiology and focuses on neuronal mechanisms underlying complex physiological functions. In addition, it examines the interface between biological mechanisms and behaviour and reviews the clinical, biological and pharmacological aspects of important behavioural disorders.