Abstract
We investigated the likelihood that bradykinesia coexisted with levodopa-induced dyskinesias (LID) in 10 dyskinetic Parkinson's disease patients (DPD). Their motor performance was compared to that of 10 age/gender-matched non-dyskinetic patients (NDPD) and 10 healthy controls. Whole-body movement (WBM) and rapid alternating movements (RAM) at the wrist were recorded simultaneously using 6-degree of freedom magnetic motion tracker and forearm rotational sensors, respectively. WBM was recorded prior to, and while subjects performed pronation-supination movements of their dominant hand with maximal rotational excursion, and as fast as possible for 10s. RANGE, VELOCITY and IRREGULARITY of pronation-supination cycles were quantified to assess motor performance. Results show that DPD patients had greater WBM than NDPD and controls during rest and RAM performance, as expected. There were no differences in motor performance between DPD and NDPD groups for RANGE and VELOCITY, despite significantly longer disease duration for the DPD group (15.5+/-6.2 years versus 6.6+/-2.6 years). However, both the NDPD and DPD groups showed significantly lower RANGE and reduced VELOCITY compared to controls, suggesting the presence of bradykinesia. For...Continue Reading
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