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

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Dyskinesia
Abnormality of muscle tone or movement.

The following references are relevant:-

Chung et al(2010)  Objective Measurement of Dyskinesia in Parkinson Disease using a Force Plate 

Timbasco et al (2012)  Clinical Aspects and Management of Levodopa-Induced Dyskinesia 

Espay et al (2012)  “On” state freezing of gait in Parkinson disease -A paradoxical levodopa-induced complication