Sensitivity of the Oxford Foot Model to marker misplacement: a systematic single-case investigation

Carty, Christopher P., Walsh, Henry P. J. and Gillett, Jarred G. (2015) Sensitivity of the Oxford Foot Model to marker misplacement: a systematic single-case investigation. Gait and Posture, 42 3: 398-401. doi:10.1016/j.gaitpost.2015.06.189

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Author Carty, Christopher P.
Walsh, Henry P. J.
Gillett, Jarred G.
Title Sensitivity of the Oxford Foot Model to marker misplacement: a systematic single-case investigation
Journal name Gait and Posture   Check publisher's open access policy
ISSN 1879-2219
Publication date 2015
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.gaitpost.2015.06.189
Open Access Status File (Author Post-print)
Volume 42
Issue 3
Start page 398
End page 401
Total pages 4
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2016
Language eng
Abstract The purpose of this paper was to systematically assess the effect of Oxford Foot Model (OFM) marker misplacement on hindfoot relative to tibia, and forefoot relative to hindfoot kinematic calculations during the stance phase of gait. Marker trajectories were recorded with an 8-camera motion analysis system (Vicon Motion Systems Ltd., UK) and ground reaction forces were recorded from three force platforms (AMTI, USA). A custom built marker cluster consisting of 4 markers in a square arrangement (diagonal distance 2 cm) was used to assess the effect of marker misplacement in the superior, inferior, anterior and posterior direction for the sustentaculum tali (STL), the proximal 1st metatarsal (P1M), distal 5th metatarsal (D5M), proximal 5th metatarsal (P5M) and lateral calcaneus (LCA) markers. In addition manual movement of the heel complex 1 cm superiorly, inferiorly, medially and laterally, and also an alignment error of 10° inversion and 10° eversion was assessed. Clinically meaningful effects of marker misplacement were determined using a threshold indicating the minimal clinically important difference. Misplacement of the heel-wand complex had the most pronounced effect on mean kinematic profiles during the stance phase across all degrees-of-freedom with respect to hindfoot–tibia and forefoot–hindfoot angles. Vertical marker misplacement of the D5M and P5M markers affected the sagittal plane, and to a lesser extent frontal plane, forefoot–hindfoot kinematics. In conclusion, the OFM is highly sensitive to misplacement of the heel-wand complex in all directions and the P5M marker in the vertical direction.
Keyword Oxford Foot Model
Gait analysis
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Medicine Publications
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