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Quantitative measurement of spastic ankle joint stiffness using a manual device: A preliminary study

Kobayashi, T, Leung, A, Akazawa, Y, Tanaka, M and Hutchins, S 2010, 'Quantitative measurement of spastic ankle joint stiffness using a manual device: A preliminary study' , Journal of Biomechanics, 43 (9) , pp. 1831-1834.

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    Abstract

    Ankle-foot orthoses (AFOs) are commonly prescribed to improve gait. The stiffness of an AFO is central for successful prescription; however, the recommended level of stiffness is currently based on the experience of clinicians. Therefore, the aim of this study was to design an experimental AFO (EAFO) whose stiffness was adjustable using commercially available oil-damper joints, and to demonstrate its potential capability in investigating the effects of altering AFO stiffness on gait. The influence of the EAFO stiffness on ankle joint kinematics in sagittal plane was evaluated in 10 patients with stroke by altering the stiffness of its oil-damper- type orthotic ankle joints using the four levels pre-set and defined by the manufacturer in dorsi- and plantarflexion directions independently. Themean peak plantarflexion angle was reduced by 105%, showing a change from 8.18 (3.14) degrees of plantarflexion to 0.38 (4.17) degrees of dorsiflexion, whilst the mean peak dorsiflexion angle was reduced by 44%, showing a change from 11.46 (5.57) degrees of dorsiflexion to 6.47 (5.23) degrees of dorsiflexion by altering the EAFO stiffness. The EAFO would therefore serve as a convenient tool when investigating the influence of AFO stiffness on gait in both clinical and research settings.

    Item Type: Article
    Themes: Health and Wellbeing
    Schools: Colleges and Schools > College of Health & Social Care > School of Health Sciences > Centre for Health Sciences Research
    Colleges and Schools > College of Health & Social Care
    Colleges and Schools > College of Health & Social Care > School of Health Sciences
    Journal or Publication Title: Journal of Biomechanics
    Publisher: Elsevier
    Refereed: Yes
    ISSN: 0021-9290
    Depositing User: RH Shuttleworth
    Date Deposited: 11 May 2011 09:52
    Last Modified: 20 Aug 2013 17:51
    URI: http://usir.salford.ac.uk/id/eprint/15732

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