NDLI: A new method for measuring AFO deformation, tibial and footwear movement in three dimensional gait analysis.

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A new method for measuring AFO deformation, tibial and footwear movement in three dimensional gait analysis.

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A new method for measuring AFO deformation, tibial and footwear movement in three dimensional gait analysis.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Ridgewell, Emily Sangeux, Morgan Bach, Timothy Baker, Richard
Description	Country affiliation: Australia Author Affiliation: Ridgewell E ( La Trobe University, Bundoora, Victoria, Australia.)
Abstract	Solid ankle-foot orthoses (AFOs) are designed to immobilise the ankle but numerous studies have measured a considerable ankle range of motion (ROM) in AFO users. Measurement of ankle kinematics may be affected by soft-tissue artefact (STA) of the knee marker, deformation of the AFO or tibial movement within the AFO. A new model based on the Conventional Gait Model (CGM) was developed to calculate these effects. Although movement of the AFO within the shoe should not affect the measured ankle joint angle the model also allows an estimation of this movement. Seven children (13 limbs) with spastic diplegic cerebral palsy were assessed to present the benefits of the new model compared to the CGM. STA of the knee marker was estimated to result in a 1.5° overestimation of total ankle ROM (from 8.2° to 9.7°). STA error was strongly related to angle of knee flexion (r=0.82) with an average maximum error of 3.8°. AFO deformation contributed approximately two thirds of the ankle ROM (6.0±4.3°) with the remaining third from tibial movement relative to the AFO (2.8±0.9°). Movement of the AFO within the footwear was very small (1.8±0.8°). A strong positive relationship (r=0.9) was found between body mass (kg) and AFO deformation which was statistically significant (p<0.001). This is the first model to attempt to quantify different contributions to ankle dorsiflexion measured during gait analysis of people wearing AFOs.
File Format	HTM / HTML
ISSN	09666362
Issue Number	4
Volume Number	38
e-ISSN	18792219
Journal	Gait & Posture
Language	English
Publisher	Elsevier
Publisher Date	2013-09-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Orthopedics Complications Humans Foot Orthoses Male Shoes Gait Disorders, Neurologic Journal Article Physiopathology Ankle Joint Artifacts Range Of Motion, Articular Biomechanical Phenomena Etiology Models, Biological Adolescent Female Physiology Rehabilitation Cerebral Palsy Child
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Rehabilitation Biophysics Sports Science

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