Abstract
Objective
To examine the task prioritization effects on postural-suprapostural dual-task performance
in patients with early-stage Parkinson disease (PD) without clinically observed postural
symptoms.
Design
Cross-sectional study. Participants performed a force-matching task while standing
on a mobile platform, and were instructed to focus their attention on either the postural
task (posture-first strategy) or the force-matching task (posture-second strategy).
Setting
University research laboratory.
Participants
Individuals (N=16) with early-stage PD who had no clinically observed postural symptoms.
Interventions
Not applicable.
Main Outcome Measures
Dual-task change (DTC; percent change between single-task and dual-task performance)
of posture error, posture approximate entropy (ApEn), force error, and reaction time
(RT). Positive DTC values indicate higher postural error, posture ApEn, force error,
and force RT during dual-task conditions compared with single-task conditions.
Results
Compared with the posture-first strategy, the posture-second strategy was associated
with smaller DTC of posture error and force error, and greater DTC of posture ApEn.
In contrast, greater DTC of force RT was observed under the posture-second strategy.
Conclusions
Contrary to typical recommendations, our results suggest that the posture-second strategy
may be an effective dual-task strategy in patients with early-stage PD who have no
clinically observed postural symptoms in order to reduce the negative effect of dual
tasking on performance and facilitate postural automaticity.
Keywords
List of abbreviations:
ApEn (approximate entropy), DTC (dual-task change), PD (Parkinson disease), RT (reaction time)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: March 30, 2018
Footnotes
Supported by the Centre for Parkinson and Movement Disorders in National Taiwan University Hospital, and the Ministry of Science and Technology, R.O.C. Taiwan (grant no. MOST 106-2314-B-002-045-MY2).
Clinical Trial Registration No.: NCT02539446.
Disclosures: none.
Identification
Copyright
© 2018 by the American Congress of Rehabilitation Medicine
