The book, which in its previous editions has enjoyed considerable success in countries such as Canada, Japan, and Italy, has been rewritten to include advances in etiology, diagnosis, and therapy. Among the many new aspects of neurology covered in the book are muscle diseases and molecular genetics, sleep disorders, pediatric neurology, recently described diseases (AIDS dementia, Lyme disease, chronic fatigue syndrome), and head trauma. The discussions of treatment for epilepsy, headaches, dementia, impotence, pain, and focal dystonias have been updated. Questions and answers follow every chapter. Some 370 questions are also found at the end of the book for an overall review. These questions are both an integral part of the book and a very useful tool for an active learning experience. The division in chapters on major neurological symptoms or syndromes provides an easy consultation source for clinicians beyond the preparation for the board examination. The references, updated and including mainly recent and classic articles and topic reviews, encourage further reading.