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  • Title: [Spatial-temporal parameters of ballistic arm abduction in normal subjects and patients with Parkinson's disease].
    Author: Pantaleo T, Fantini L, Urbani F, Baroni A.
    Journal: Boll Soc Ital Biol Sper; 1981 Oct 30; 57(20):2087-93. PubMed ID: 7317203.
    Abstract:
    Spatio-temporal parameters of ballistic arm abduction movements were studied in healthy control subjects and in patients with Parkinson's disease. Arm abduction was performed during a step-tracking task. Patients showed longer reaction times, slower mean velocities and lesser accuracy, with a marked tendency to undershooting. In patients, "ballistic" movements (taken as initial movements completed within a mean reaction time or less) were fewer and more inaccurate. Moreover, their motor performance was greatly impaired in motor tasks including slight expected perturbations during the movement: evident changes in velocity or even arrests, together with inability to overcome the obstacle were observed. The motor performance of all tested subjects did not differ significantly in visual open-loop conditions. The present results: i) support the hypothesis that Parkinsonism interferes with the generation of accurate ballistic actions and ii) contribute to the understanding of bradykinesia.
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