Abstract
Objective
To investigate the kinematic and myographic effects of weighted wrist cuffs on individuals
with Parkinson disease (PD) during a reaching task.
Design
Cross-sectional study.
Setting
Biomechanics research laboratory.
Participants
Individuals (N=39) with PD (n=19) and healthy age-matched control subjects (n=20).
Interventions
Participants were instructed to reach and grasp a can at a distance of 80% of their
arm length without a wrist cuff, while wearing separate 0.5- and 1.0-kg wrist cuffs,
and subsequently without a wrist cuff.
Main Outcome Measures
Movement time, kinematic, and electromyographic data were recorded during all reach
and grasp movements. Four end point coordinate strategy variables, 3 joint recruitment
variables, and 2 co-contraction indices were derived from the raw data for analysis.
Results
Significant interaction effects were found in the trunk and index finger movement
time as the weight of the cuff increased from 0.5 to 1.0kg. The group of individuals
with PD showed decreased movement times in both instances, whereas the control group
showed increased movement times as the weight of the wrist cuff increased from baseline
to 0.5 and 1.0kg. No group difference was observed in the co-contraction index of
the upper arm and forearm.
Conclusions
Adoption of weighted wrist cuffs in the clinic should be cautiously undertaken because
compensatory movements may be induced in the trunk of individuals with PD.
Keyword
List of abbreviations:
MMSE (Mini-Mental State Examination), MT (movement time), PD (Parkinson disease), PV (peak velocity)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: December 21, 2017
Footnotes
Supported in part by the Healthy Aging Research Center (grant no. EMRPD1G0241), Chang Gung Memorial Hospital (grant no. BMRPC58), the National Sciences Council (grant no. NSC102-2314-B-182-009-MY3), and the Ministry of Science and Technology (grant no. MOST105-2314-B-182-011) in Taiwan.
Disclosures: none.
Identification
Copyright
© 2017 by the American Congress of Rehabilitation Medicine
