Quantification and visualization of coordination during non-cyclic upper extremity motion
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PIIS0021929017304189.pdf
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3.39 MB
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Author(s)
Fineman, Richard A.
Stirling, Leia A.
Date Issued
August 2017
Journal
Journal of Biomechanics
Publisher
Elsevier
Citation
Fineman, Richard A., and Leia A. Stirling. “Quantification and Visualization of Coordination During Non-Cyclic Upper Extremity Motion.” Journal of Biomechanics 63 (October 2017): 82–91 © 2017 The Authors
Version
Final published version
Abstract
There are many design challenges in creating at-home tele-monitoring systems that enable quantification and visualization of complex biomechanical behavior. One such challenge is robustly quantifying joint coordination in a way that is intuitive and supports clinical decision-making. This work defines a new measure of coordination called the relative coordination metric (RCM) and its accompanying normalization schemes. RCM enables quantification of coordination during non-constrained discrete motions. Here RCM is applied to a grasping task. Fifteen healthy participants performed a reach, grasp, transport, and release task with a cup and a pen. The measured joint angles were then time-normalized and the RCM time-series were calculated between the shoulder-elbow, shoulder-wrist, and elbow-wrist. RCM was normalized using four differing criteria: the selected joint degree of freedom, angular velocity, angular magnitude, and range of motion. Percent time spent in specified RCM ranges was used as. a composite metric and was evaluated for each trial. RCM was found to vary based on: (1) chosen normalization scheme, (2) the stage within the task, (3) the object grasped, and (4) the trajectory of the motion. The RCM addresses some of the limitations of current measures of coordination because it is applicable to discrete motions, does not rely on cyclic repetition, and uses velocity-based measures. Future work will explore clinically relevant differences in the RCM as it is expanded to evaluate different tasks and patient populations. Keywords: Coordination;
Tele-rehabilitation; Grasp; Upper extremity; Performance metrics
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/J.JBIOMECH.2017.08.008
