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The validity of forceplate data as a measure of rapid and targeted volitional movements of the center of mass in transtibial prosthesis users
Jönköping University, School of Health and Welfare, HHJ, Dep. of Rehabilitation. Jönköping University, School of Health and Welfare, HHJ. ADULT. (Prosthetics and Orthotics, ADULT)ORCID iD: 0000-0002-0220-6278
2017 (English)In: Disability and Rehabilitation: Assistive Technology, ISSN 1748-3107, E-ISSN 1748-3115, Vol. 12, no 7, p. 686-693Article in journal (Refereed) Published
Abstract [en]

Purpose: To validate outcome variables from the Limits of Stability protocol that are derived from the center of pressure with those same variables derived from the center of mass during rapid, volitional responses in transtibial prosthesis users.

Method: Prosthesis users (n=21) and matched controls (n=21) executed movements while force and motion data were collected.  Correlation coefficients were used to investigate relationships between center of pressure and center of mass for: x/y coordinates positions, Limits of Stability outcome variables and muscular reaction times. 

Results: Significant differences were seen in correlation between x/y coordinate positions toward the intact limb (mean effect size of differences: r = 0.38).  Limits of Stability variables were positively correlated (reaction time and maximum excursion range rs: 0.585 – 0.846; directional control and mean velocity range rs: 0.307 – 0.472).  Muscular reaction times correlated weakly with those from center of pressure (mean rs prosthesis users – 0.186 and controls –  0.101). 

Conclusions: Forceplate measures are valid in describing rapid, volitional movements in unilateral transtibial prosthesis users.  Limits of Stability outcomes extracted from center of pressure and center of mass are highly correlated but can be sensitive to direction.  Muscular reaction time correlates very little with reaction times extracted from the other variables.

Place, publisher, year, edition, pages
Taylor & Francis, 2017. Vol. 12, no 7, p. 686-693
Keywords [en]
Balance, Postural Control, Transtibial, Amputee, Prosthesis, Limits of Stability, Posture, Coordination, Volitional, Center of Pressure, Center of Mass.
National Category
Orthopaedics
Identifiers
URN: urn:nbn:se:hj:diva-31177DOI: 10.1080/17483107.2016.1222002ISI: 000418490800004PubMedID: 27653156Scopus ID: 2-s2.0-84988646767OAI: oai:DiVA.org:hj-31177DiVA, id: diva2:951215
Available from: 2016-08-08 Created: 2016-08-08 Last updated: 2018-01-19Bibliographically approved

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Rusaw, David

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