On the accuracy of the conventional gait model:​ distinction between marker misplacement and soft tissue artefact errors

Leboeuf, F.; Barre, A.; Aminian, K.; Sangeux, M.

Affiliations

¹Motion analysis service, Physical Medicine and Rehabilitation, Teaching Hopital of Nantes, France

²School of Health & Society, The University of Salford, UK

³Nantes Université, Movement - Interactions - Performance, MIP, UR 4334, F-44000 Nantes, France

⁴Moveck Solution Inc, Québec, Canada

⁵Laboratory for Movement Analysis and Measurement, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland

⁶University Children’s Hospital, Basel, Switzerland

Abstract and keywords

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.

Keywords: Gait analysis; Conventional Gait Model; Model validity; Soft tissue artefact; Marker misplacement

Links

DOI: 10.1016/j.jbiomech.2023.111774

PubMed: 37690367

WoS: 001078041000001

History

Accepted: 2023-08-21

Online: 2023-08-24

Cited Works (5)

Year	Entry
1991	Davis RB III, Õunpuu S, Tyburski D, Gage JR. A gait analysis data collection and reduction technique. Hum Mov Sci. October 1991;10(5):575-587.
2005	Leardini A, Chiari L, Della Croce U, Cappozzo A. Human movement analysis using stereophotogrammetry, III: soft tissue artifact assessment and compensation. Gait Post. February 2005;21(2):212-225.
2005	Della Croce U, Leardini A, Chiari L, Cappozzo A. Human movement analysis using stereophotogrammetry, IV: assessment of anatomical landmark misplacement and its effects on joint kinematics. Gait Post. February 2005;21(2):226-237.
1990	Kadaba MP, Ramakrishnan HK, Wootten ME. Measurement of lower extremity kinematics during level walking. J Orthop Res. May 1990;8(3):383-392.
2006	Benoit DL, Ramsey DK, Lamontagne M, Xu L, Wretenberg P, Renström P. Effect of skin movement artifact on knee kinematics during gait and cutting motions measured in vivo. Gait Post. October 2006;24(2):152-164.