The required coefficient of friction in Parkinson's disease: people with freezing of gait

The required coefficient of friction in Parkinson's disease: people with freezing of gait

The required coefficient of friction (RCOF) is frequently reported in the literature as an indicator of slip propensity, a consequence of the collisional aspect of legged locomotion. Little is known about the RCOF in pathological gait. Therefore, this study aimed to quantify the RCOF in subjects wit...

Full description

Saved in:
Bibliographic Details
Published in:Functional neurology Vol. 33; no. 3; pp. 137 - 142
Main Authors: Rozin Kleiner, Ana Francisca, Cubillos, Diana M, Pinto, C, Salazar, A P, Marchese, R R, Barros, R M L, Galli, M, Pagnussat, A S
Format: Journal Article
Language:English
Published: Italy CIC Edizioni Internazionali 01-07-2018
Subjects:
Aged
Ankle
Biomechanical Phenomena
Biomechanics
Cerebral palsy
Falls
Female
Flooring
Friction
Gait
Humans
Kinematics
Male
Middle Aged
Multiple sclerosis
Parkinson Disease - physiopathology
Parkinson's disease
Stroke
Walking
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The required coefficient of friction (RCOF) is frequently reported in the literature as an indicator of slip propensity, a consequence of the collisional aspect of legged locomotion. Little is known about the RCOF in pathological gait. Therefore, this study aimed to quantify the RCOF in subjects with Parkinson's disease (PD) and freezing of gait (FOG) during the OFF-pharma phase, and to investigate the interplay between RCOF parameters and ankle kinematic and kinetic gait variables. Fourteen subjects with PD and 14 healthy age-matched subjects were instructed to walk barefoot at self-selected speed over a force platform. The RCOF curve was obtained as the ratio between the tangential and vertical ground reaction forces. Then, the following discrete variables were identified: P1COF (the peak at the loading response phase), V1COF (the valley at midstance phase) and P2COF (the peak at push-off phase). Stepwise multiple regressions were applied to observe the influence of the gait speed and ankle kinematic and kinetic gait variables on RCOF variables. In subjects with PD and FOG the gait speed is a predictor of the RCOF in the loading response phase; plantarflexion and the plantarflexion moment are strong predictors of the RCOF in midstance; finally, push-off power is a predictor of RCOF increasing in the push-off phase. These results characterized the biomechanical strategies adopted by subjects with PD and FOG during gait in order to avoid falls.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0393-5264
1971-3274
DOI:10.11138/FNeur/2018.33.3.137