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Gait coordination in Parkinson disease: effects of step length and cadence manipulations.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Williams, April J. Peterson, Daniel S. Earhart, Gammon M.
Description	Country affiliation: United States Author Affiliation: Williams AJ ( Program in Physical Therapy, Washington University in St Louis School of Medicine, St Louis, MO 63108, United States.)
Abstract	BACKGROUND: Gait impairments are well documented in those with PD. Prior studies suggest that gait impairments may be worse and ongoing in those with PD who demonstrate FOG compared to those with PD who do not. PURPOSE: Our aim was to determine the effects of manipulating step length and cadence individually, and together, on gait coordination in those with PD who experience FOG, those with PD who do not experience FOG, healthy older adults, and healthy young adults. METHODS: Eleven participants with PD and FOG, 16 with PD and no FOG, 18 healthy older, and 19 healthy young adults walked across a GAITRite walkway under four conditions: Natural, Fast (+50% of preferred cadence), Small (-50% of preferred step length), and SmallFast (+50% cadence and -50% step length). Coordination (i.e. phase coordination index) was measured for each participant during each condition and analyzed using mixed model repeated measure ANOVAs. RESULTS: FOG was not elicited. Decreasing step length alone or decreasing step length and increasing cadence together affected coordination. Small steps combined with fast cadence resulted in poorer coordination in both groups with PD compared to healthy young adults and in those with PD and FOG compared to healthy older adults. CONCLUSIONS: Coordination deficits can be identified in those with PD by having them walk with small steps combined with fast cadence. Short steps produced at high rate elicit worse coordination than short steps or fast steps alone.
File Format	HTM / HTML
ISSN	09666362
e-ISSN	18792219
DOI	10.1016/j.gaitpost.2012.12.009
Journal	Gait & Posture
Issue Number	2
Volume Number	38
Language	English
Publisher	Elsevier
Publisher Date	2013-06-01
Publisher Place	Great Britain (UK)
Access Restriction	Open
Subject Keyword	Research Support, N.i.h., Extramural Research Support, Non-u.s. Gov't Discipline Orthopedics Gait Complications Gait Disorders, Neurologic Physiopathology Parkinson Disease Case-control Studies Etiology Ataxia Physiology
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Rehabilitation Biophysics Sports Science

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