Technical Brief

How Different Marker Sets Affect Joint Angles in Inverse Kinematics Framework

[+] Author and Article Information
Giulia Mantovani

School of Human Kinetics, University of Ottawa, Canada

Mario Lamontagne

School of Human Kinetics, University of Ottawa, CanadaDepartment of Mechanical Engineering, University of Ottawa, Canada

1Corresponding author.

ASME doi:10.1115/1.4034708 History: Received March 26, 2016; Revised September 03, 2016


The choice of marker set is a source of variability in motion analysis. Studies exist that assess the performance of marker sets when direct kinematics is used, but these results cannot be extrapolated to the inverse kinematic framework. Therefore, the purpose of this study was to examine the sensitivity of kinematic outcomes to inter-marker set variability in an inverse kinematic framework. The compared marker sets were Plug-in-Gait, University of Ottawa Motion Analysis Model and a 3-marker-cluster marker set. Walking trials of twelve participants were processed in OpenSim. The coefficient of multiple correlations was very good for sagittal (>0.99) and transverse (>0.92) plane angles, but worsened for the transverse plane (0.72). Absolute reliability indices are also provided for comparison among studies: minimum detectable change values ranged from the 3° for the hip sagittal range of motion, to the 16.6° of the hip transverse range of motion. Ranges of motion of hip and knee abduction/adduction angles, and hip and ankle rotations were significantly different among the three marker configurations (P<0.001), with Plug-in-Gait producing larger ranges of motion. Although the same model was used for all marker sets, the resulting minimum detectable changes were high and clinically relevant, which warns for caution when comparing studies that use different marker configurations, especially if they differ in the joint-defining markers.

Copyright (c) 2016 by ASME
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In