Amazon.com description: Product Description: Rapid changes in the theory and practice of neurology during the last few decades have resulted both in an enrichment of the discipline's vocabulary and a displacement of certain diseases to other categories of classification. In view of these changes, this highly practical cumulative index integrates indices of previous volumes and fully incorporates the wealth of subtle and drastic changes in concepts and semantics of recent years. A valuable addition to the series, providing even easier access to the most comprehensive source of information in neurology.