Progress and Prospects in Parkinson's Research/Symptoms/Myoclonus

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Myoclonus
Sudden violent jerks.

The following references are relevant:-

Mera et al (2011) Feasibility of home-based automated Parkinson’s disease motor assessment

Lanska (2010) Chapter 33: the history of movement disorders 

Kojovic et al (2011) Myoclonic disorders: a practical approach for diagnosis and treatment