Editorial and introduction: Behavioral aspects of Parkinson's disease

  • Joseph H. Friedman
    Butler Hospital, Department of Neurology, Alpert Medical School of Brown University, RI, USA
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  • Roongroj Bhidayasiri
    Corresponding author at: Chulalongkorn Center of Excellence for Parkinson's Disease & Related Disorders, Chulalongkorn University Hospital, 1873 Rama 4 Road, Bangkok 10330, Thailand.
    Chulalongkorn Center of Excellence for Parkinson's Disease & Related Disorders, Department of Medicine, Faculty of Medicine, Chulalongkorn University and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok 10330, Thailand

    Department of Rehabilitation Medicine, Juntendo University, Tokyo, Japan
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  • Daniel D. Truong
    Truong Neuroscience Institute, Parkinson's and Movement Disorders Institute, Orange Coast Memorial Medical Center, Fountain Valley, CA, USA
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Published:January 04, 2017DOI:
      “A wise man knows what he does not know.” Yet in the 200 years since James Parkinson identified the “shaking palsy,” it is only in the last two or three decades that we have come to understand some of what he didn't know we didn't know, and, thank goodness, it's coming at an increasing rate [
      • Parkinson J.
      Essay on the Shaking Palsy.
      ]. We have learned a lot in these years, but we have also learned a lot about our state of ignorance. And who knows what else is yet to be learned? The harder we look the harder the problems seem.


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