Table 1.

Types of Dyskinesia in Parkinson’s Disease

	Type of Movement	Areas Interested	Other Features
“Peak dose”, “benefit of dose”, “ON” dyskinesia	Choreic. In early phase, only “action” chorea. Dystonic components may be present	Neck, axial, proximal upper limbs	Usually not disabling or painful. Poor awareness. Impact on quality of life often absent.
“Diphasic” or “beginning and end of dose” dyskinesia	Dystonic-ballistic-stereotypic	Lower limbs	Disabling, often painful. Significant impact on quality of life. Possible concomitant tremor in the upper limbs and hypomimia.
“OFF” period dystonia	Prolonged spasms and postures	Foot	The most common form is early morning dystonia.