World Parkinson’s Disease Day—which falls on 11 April—commemorates the birthday of the late physician and geologist, James Parkinson. All around the world, efforts are under way to increase public awareness of the condition first described by Parkinson over 200 years ago. Over the past 2 decades, Parkinson’s disease (PD) is viewed as more a clinical syndrome than a single disease entity characterised by motor features of tremor, bradykinesia, rigidity and postural instability. The identification of several pathogenic genes and loci and the recognition of non-motor symptoms and prodromic features have redefined classification of PD and expanded the clinical spectrum of the disease.
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