Functional imaging has the capability to reveal changes in the pathophysiology of tissues and organ systems, mapping the progression and severity of disease, uptake of drugs, and the recovery of tissues following trauma, disease episodes or surgery. In this authoritative new work, leading specialists in neurology and neuroimaging present an update on the MRI and PET investigation of diseases of the central nervous system. An insightful reference for anyone working in the field, this work discusses how these new technologies can be used to investigate the most important disorders encountered in clinical neurology and psychiatry, ranging from chronic progressive diseases such as Alzheimer's, episodic disruptions of function as seen in epilepsy, and the subtle changes caused by drug dependency and abuse.