Document Detail

Adaptation of gait termination on a slippery surface in Parkinson's disease.
MedLine Citation:
PMID:  23031626     Owner:  NLM     Status:  MEDLINE    
Parkinson's disease (PD) causes instability and difficulty adapting to changing environmental and task demands. We examined the effects of PD on the adaptation of gait termination (GT) on a slippery surface under unexpected and cued circumstances. An unexpected slip perturbation during GT was followed by a slip perturbation during GT under two conditions: planned over multiple steps and cued one step prior to GT. Feed forward and feedback-based responses to the perturbation were compared to determine (1) how PD affects the ability to integrate adaptive feed forward and feedback-based GT strategies on a slippery surface, (2) if adaptations can be implemented when GT is required within one step, and (3) if behaviour changes with repeated exposure. Similar to the control group (n=10), the PD group (n=8) adapted and integrated feed forward and feedback-based components of GT under both stop conditions. Feed forward adaptations included a shorter, wider step, and appropriate stability margin modifications. Feedback-based adaptations included a longer, wider subsequent step. When cued to stop quickly, both groups maintained most of these adaptations: foot angle at contact increased in the first cued stop but adapted with practice. The group with PD differed in their ability to adapt GT with slower, wider steps and less stability.
A R Oates; K Van Ooteghem; J S Frank; A E Patla; F B Horak
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2012-09-30
Journal Detail:
Title:  Gait & posture     Volume:  37     ISSN:  1879-2219     ISO Abbreviation:  Gait Posture     Publication Date:  2013 Apr 
Date Detail:
Created Date:  2013-03-29     Completed Date:  2013-09-16     Revised Date:  2014-04-02    
Medline Journal Info:
Nlm Unique ID:  9416830     Medline TA:  Gait Posture     Country:  England    
Other Details:
Languages:  eng     Pagination:  516-20     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Elsevier B.V. All rights reserved.
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MeSH Terms
Accidental Falls
Adaptation, Physiological*
Biomechanical Phenomena
Case-Control Studies
Gait Disorders, Neurologic / etiology,  physiopathology*
Middle Aged
Parkinson Disease / complications,  physiopathology*
Postural Balance
Psychomotor Performance
Grant Support
R01 AG006457/AG/NIA NIH HHS; R37 AG006457/AG/NIA NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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