Document Detail

Effects of postural threat on walking features of Parkinson's disease patients.
MedLine Citation:
PMID:  19383427     Owner:  NLM     Status:  MEDLINE    
This study investigated whether or not gait kinematics among healthy older individuals and Parkinson's disease (PD) patients are influenced by postural threat. Eight healthy older individuals and eight PD patients were examined while walking at self-selected velocities, under three conditions of postural threat: unconstrained floor; constrained floor (19cm wide); constrained and elevated floor (19cm wide by 10cm high). Independent of the surface conditions, due to motor disturbances caused by the PD these patients walked slower, with shorter strides, and spent more time in the double support phase and less time in the swing phase than did their matched controls. Increases in postural threat resulted in altered gait kinematics for all subjects. Specifically, stride length, stride velocity, cadence, and heel contact velocity decreased, and stride duration and double support duration increased relative to increases in postural threat. All gait alterations were the result of participants' attempts to facilitate locomotion control and maintain stability. The results of this study reveal that width and height constraints effectively perturbed the balance of all of the walking older individuals. The PD patients were able to modulate gait parameters when faced by a postural threat task.
Maria Joana Duarte Caetano; Lilian Teresa Bucken Gobbi; Mónica Del Rosario Sánchez-Arias; Florindo Stella; Sebastião Gobbi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-01-24
Journal Detail:
Title:  Neuroscience letters     Volume:  452     ISSN:  0304-3940     ISO Abbreviation:  Neurosci. Lett.     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-04-22     Completed Date:  2009-06-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7600130     Medline TA:  Neurosci Lett     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  136-40     Citation Subset:  IM    
UNESP -- São Paulo State University at Rio Claro, Posture and Gait Studies Lab, Brazil.
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MeSH Terms
Exercise Test / methods*
Gait / physiology
Gait Disorders, Neurologic / diagnosis,  etiology,  physiopathology*
Leg / physiopathology
Middle Aged
Muscle, Skeletal / physiopathology
Parkinson Disease / diagnosis,  physiopathology*
Postural Balance / physiology*
Predictive Value of Tests
Walking / physiology

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

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