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Open AccessArticle

Comparison of a New Inertial Sensor Based System with an Optoelectronic Motion Capture System for Motion Analysis of Healthy Human Wrist Joints

1
Division of Plastic Surgery and Hand Surgery, University Hospital Zurich, University of Zurich, Raemistrasse 100, 8091 Zurich, Switzerland
2
Institute for Biomechanics, ETH Zurich, Raemistrasse 101, 8092 Zurich, Switzerland
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Dept. Matematics and Informatics, University of Barcelona, Gran Via 585, 08007 Barcelona, Spain
4
Department of Orthopedics, Balgrist University Hospital, Forchstrasse 340, 8008 Zurich, Switzerland
5
Computer Vision Center, 08193 Bellaterra, Spain
*
Authors to whom correspondence should be addressed.
These Authors contributed equally to this work.
Sensors 2019, 19(23), 5297; https://doi.org/10.3390/s19235297
Received: 23 October 2019 / Revised: 14 November 2019 / Accepted: 27 November 2019 / Published: 1 December 2019
(This article belongs to the Section Electronic Sensors)
This study aims to compare a new inertial measurement unit based system with the highly accurate but complex laboratory gold standard, an optoelectronic motion capture system. Inertial measurement units are sensors based on accelerometers, gyroscopes, and/or magnetometers. Ten healthy subjects were recorded while performing flexion-extension and radial-ulnar deviation movements of their right wrist using inertial sensors and skin markers. Maximum range of motion during these trials and mean absolute difference between the systems were calculated. A difference of 10° ± 5° for flexion-extension and 2° ± 1° for radial-ulnar deviation was found between the two systems with absolute range of motion values of 126° and 50° in the respective axes. A Wilcoxon rank sum test resulted in a no statistical differences between the systems with p-values of 0.24 and 0.62. The observed results are even more precise than reports from previous studies, where differences between 14° and 27° for flexion-extension and differences between 6° and 17° for radial-ulnar deviation were found. Effortless and fast applicability, good precision, and low inter-observer variability make inertial measurement unit based systems applicable to clinical settings. View Full-Text
Keywords: inertial measurement units; kinematics; motion analysis; optoelectronic motion capture; wrist; range of motion; clinical assessments inertial measurement units; kinematics; motion analysis; optoelectronic motion capture; wrist; range of motion; clinical assessments
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Wirth, M.A.; Fischer, G.; Verdú, J.; Reissner, L.; Balocco, S.; Calcagni, M. Comparison of a New Inertial Sensor Based System with an Optoelectronic Motion Capture System for Motion Analysis of Healthy Human Wrist Joints. Sensors 2019, 19, 5297.

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