This third volume in the "Psychiatry in Progress" series deals with a topic which is of increasing importance as populations are becoming steadily older. In keeping with others in the series, this volume contains chapters from the world's leading experts, with authoritative views on the most important aspects of the field, including the physiology and pathology of brain aging and Alzheimer's disease, the epidemiology of psychiatric disorders, molecular and genetic factors, problems of classification (ICD-10 and DSM IV), and psychological testing, as well as diagnosis, treatment and ethical issues. This volume appears under the auspices of the International PTC Committee.