The reliability of humerothoracic angles during arm elevation depends on the representation of rotations

Journal of Biomechanics
Juan López-PascualÁlvaro Page

Abstract

The reliability of joint rotation measurements is an issue of major interest, especially in clinical applications. The effect of instrumental errors and soft tissue artifacts on the variability of human motion measures is well known, but the influence of the representation of joint motion has not yet been studied. The aim of the study was to compare the within-subject reliability of three rotation formalisms for the calculation of the shoulder elevation joint angles. Five repetitions of humeral elevation in the scapular plane of 27 healthy subjects were recorded using a stereophotogrammetry system. The humerothoracic joint angles were calculated using the YX'Y" and XZ'Y" Euler angle sequences and the attitude vector. A within-subject repeatability study was performed for the three representations. ICC, SEM and CV were the indices used to estimate the error in the calculation of the angle amplitudes and the angular waveforms with each method. Excellent results were obtained in all representations for the main angle (elevation), but there were remarkable differences for axial rotation and plane of elevation. The YX'Y" sequence generally had the poorest reliability in the secondary angles. The XZ'Y' sequence proved to be the most ...Continue Reading

References

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Dec 18, 2013·Journal of Biomechanical Engineering·Álvaro PageAntonio Besa

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Citations

Oct 14, 2017·Journal of Motor Behavior·Juan López-PascualPilar Serra-Añó
Aug 26, 2017·PloS One·Juan López-PascualPilar Serra-Añó
Oct 28, 2018·Medical & Biological Engineering & Computing·Rakesh KrishnanChristian Smith
Jan 27, 2019·Sports Biomechanics·Thomas ProvotMarcela Munera

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