The twelfth edition of Brain's Diseases of the Nervous System builds on the success of the previous editions of this classic neurology resource. Providing detailed coverage of the full range of major neurological conditions, with new and revised sections from highly experienced and well established authorities in their fields (including updated sections on genetics, development neurology, and re-written introductory chapters), this edition continues to be the definitive guide to clinical neurology. The online version of Brain's Diseases of the Nervous System contains the full text of the print edition (which can be browsed by the contents list or searched), links from references in the text to external sources (via PubMed, ISI, and CrossRef), and all figures and illustrations from the print edition, downloadable into PowerPoint.