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  • Title: The effect of eating utensil weight on functional arm movement in people with Parkinson's disease: a controlled clinical trial.
    Author: Ma HI, Hwang WJ, Tsai PL, Hsu YW.
    Journal: Clin Rehabil; 2009 Dec; 23(12):1086-92. PubMed ID: 19906764.
    Abstract:
    OBJECTIVE: To investigate the effect of eating utensil weight on kinematic performance in people with Parkinson's disease. DESIGN: A counterbalanced repeated-measures design. SETTING: A motor control laboratory in a university setting. SUBJECTS: Eighteen adults with Parkinson's disease and 18 age-matched controls. EXPERIMENTAL CONDITIONS: Each participant performed a food transfer task using spoons of three different weights: lightweight (35 g), control (85 g) and weighted (135 g). Kinematic variables of arm movement were derived and compared between conditions. MAIN MEASURES: Kinematic variables of arm movement, including movement time, peak velocity and number of movement units. RESULTS: Utensil weights significantly affected the movement kinematicsof all participants. Both groups had fewer movement units in the lightweight condition (Parkinson's disease group: 22.18, controls: 19.89) than in the weighted condition (Parkinson's disease group: 22.68, controls: 21.36), suggesting smoother movement in the former condition. In addition, both groups had higher peak velocity in the lightweight than in the weighted condition. CONCLUSIONS: Our findings suggest that a lightweight utensil may facilitate smoother and higher-velocity arm movement than a weighted one in people with Parkinson's disease.
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