Related Experiment Video
Updated: Aug 11, 2026

Clinical-oriented Three-dimensional Gait Analysis Method for Evaluating Gait Disorder
Published on: March 4, 2018
On the accuracy of the Conventional gait Model: Distinction between marker misplacement and soft tissue artefact
F Leboeuf1, A Barre2, K Aminian3
1Motion analysis service, Physical Medicine and Rehabilitation, Teaching Hopital of Nantes, France; School of Health & Society, The University of Salford, UK; Nantes Université, Movement - Interactions - Performance, MIP, UR 4334, F-44000 Nantes, France.
Abstract:
There is a lack of knowledge about the accuracy of the Conventional Gait Model (CGM), compared to the true bone motion. Accuracy is hindered by both marker misplacement and soft-tissue artefact (STA). The effect of the lateral knee marker (KNE) misplacement and STA was determined from a secondary analysis of 13 subjects equipped with a total knee prothesis for which simultaneous dual-plane fluoroscopy and marker-based motion capture was available. In average, STA alone led to 3.3°, 2.9° and 6.7° errors for knee flexion, knee abduction, and the absolute hip rotation respectively. In comparison, marker misplacement led to 0.9°, 4.0° and 12.3° errors for the same kinematics. We showed that STA alone may lead to knee flexion-adduction cross-talk. This finding has clinical repercussions for the use of knee cross talk as a qualitative indicator of knee axis alignment. Our study showed that cumulative effects of marker misplacement and STA affect the transverse plane angles, making challenging to track internal/external rotation with less than 5° of errors.
More Related Videos
Related Concept Videos
Stereotype Content Model
Errors and Mistakes in Surveying
Errors in Taping
Common Leveling Mistakes and Errors
Typical Model Studies

