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The fourth edition of the popular and unique Parkinson's Disease: A Guide for Patient and Family has Jacob Sage joining Roger Duvoisin as author. The scholarly tone remains, with even more details. Many of the previous valuable aspects are retained, including a glossary that is selective and clear and an appendix that summarizes the strength of the occasionally cooperating lay organizations. The same academic center that once suggested through twin studies that genetics plays a relatively small role in Parkinson's disease now reflects in this book its leadership in documenting the genetic linkages in Parkinson's disease. Readers are likely to conclude that Parkinson's disease, Alzheimer's disease, and similar "degenerations" reflect a combination of genetic predisposition and toxic or infectious insults, combined with the effects of aging.
The historical aspects, a particular strength of the senior author, are emphasized more than in the past but surprisingly appear near the end of