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Related Concept Videos

Bones of the Upper Limb: Humerus01:19

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The connective tissues play a significant role in arranging the muscle fibers into a hierarchical structure that forms a complete muscle. Consider a muscle like the bicep brachii, commonly called the bicep. This muscle comprises thousands of muscle fibers enclosed by a protective layer of connective tissue called the endomysium. The endomysium is primarily composed of reticular fibers, a type of thin collagen fiber. It allows the exchange of nutrients and waste products at the fiber level,...
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Construction of a Realistic, Whole-Body, Three-Dimensional Equine Skeletal Model using Computed Tomography Data
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Comparison of a Scaled Cadaver-Based Musculoskeletal Model With a Clinical Upper Extremity Model.

Vikranth H Nagaraja1, Jeroen H M Bergmann1, Michael S Andersen2

  • 1Department of Engineering Science, Institute of Biomedical Engineering, University of Oxford, Oxford OX1 3PJ, UK.

Journal of Biomechanical Engineering
|November 8, 2022
PubMed
Summary

Comparing two upper extremity (UE) kinematic models, this study found broad agreement between the Dutch Shoulder Model and Vicon Plug-in Gait, despite some key differences in shoulder, elbow, and wrist joint angles.

Keywords:
Dutch Shoulder ModelPlug-in Gait modelagreementcomparisonkinematicsmultibody kinematics optimizationmusculoskeletal modelingsingle-body kinematics optimizationupper extremity

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Area of Science:

  • Biomechanics
  • Human Movement Analysis
  • Musculoskeletal Modeling

Background:

  • Accurate estimation of joint kinematics from optical motion capture is crucial for biomechanical studies.
  • Musculoskeletal (MSK) models require validated kinematics for reliable joint and muscle load predictions.
  • Comparing different kinematic models enhances confidence in MSK model outputs.

Purpose of the Study:

  • To rigorously compare upper extremity (UE) joint kinematics derived from the Dutch Shoulder Model (multibody kinematics optimization - MKO) and the Vicon Plug-in Gait model (single-body kinematics optimization - SKO).
  • To assess the agreement and differences between these two widely used kinematic models for human movement analysis.

Main Methods:

  • Ten subjects performed reaching tasks in a 3D motion capture laboratory.
  • UE joint kinematics were calculated using both the Dutch Shoulder Model (MKO) and Vicon Plug-in Gait (SKO).
  • Comparisons involved joint angles, marker trajectories, and residuals using scatter and Bland-Altman plots.

Main Results:

  • Largest differences observed for shoulder, followed by elbow and wrist kinematics.
  • All root-mean-squared differences were below 10 degrees, though potentially clinically significant.
  • Strong-to-excellent Spearman correlations and good agreement in Bland-Altman plots were found between the models.

Conclusions:

  • The Dutch Shoulder Model and Vicon Plug-in Gait model demonstrate broad agreement in UE kinematics.
  • Key differences exist, particularly at the shoulder, warranting consideration for specific applications.
  • Further validation is needed, especially for clinical applications where small differences may matter.