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Validation of an OpenSim full-body model with detailed lumbar spine for estimating lower lumbar spine loads during symmetric and asymmetric lifting tasks

Erica Beaucage-GauvreauSchool of Mechanical Engineering, The University of Adelaide, Adelaide, South Australia, Australia; ;Spinal Research Group, Centre for Orthopaedic & Trauma Research, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia; Correspondence[email protected]

William S. P. RobertsonSchool of Mechanical Engineering, The University of Adelaide, Adelaide, South Australia, Australia;

http://orcid.org/0000-0001-7351-8378

Scott C. E. BrandonSchool of Engineering, The University of Guelph, Guelph, Ontario, Canada;

http://orcid.org/0000-0003-1717-5889

Robert FraserAffiliate Professor, The University of Adelaide, Adelaide, South Australia, Australia; ;Spinal Surgery, Royal Adelaide Hospital, Adelaide, South Australia, Australia;

Brian J. C. FreemanSpinal Services, Royal Adelaide Hospital, Adelaide, South Australia, Australia; ;Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia; ;Research Fellow, South Australian Health and Medical Research Institute, Spinal Unit Administration, Royal Adelaide Hospital, Adelaide, South Australia, Australia;

Ryan B. GrahamSchool of Human Kinetics, The University of Ottawa, Ottawa, Ontario, Canada;

http://orcid.org/0000-0001-7502-8065

Dominic ThewlisCentre for Orthopaedic & Trauma Research, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia;

http://orcid.org/0000-0001-6614-8663

Claire F. JonesSpinal Research Group, Centre for Orthopaedic & Trauma Research, Adelaide Medical School, The University of Adelaide, Adelaide, South Australia, Australia; ;School of Mechanical Engineering, The University of Adelaide, Adelaide, South Australia, Australia

http://orcid.org/0000-0002-0995-1182

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Abstract

There is currently no validated full-body lifting model publicly available on the OpenSim modelling platform to estimate spinal loads during lifting. In this study, the existing full-body-lumbar-spine model was adapted and validated for lifting motions to produce the lifting full-body model. Back muscle activations predicted by the model closely matched the measured erector spinae activation patterns. Model estimates of intradiscal pressures and in vivo measurements were strongly correlated. The same spine loading trends were observed for model estimates and reported vertebral body implant measurements. These results demonstrate the suitability of this model to evaluate changes in lumbar loading during lifting.

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Acknowledgements

The authors gratefully acknowledge funding from Endeavour Scholarships, SafeWork SA, and AOSpine Australia New Zealand (AOSAUNZ(R) 2017-05). CFJ is supported by an NHMRC Early Career Fellowship and DT is supported by an NHMRC Career Development Fellowship.

Disclosure statement

No potential conflict of interest was reported by the author(s).

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Validation of an OpenSim full-body model with detailed lumbar spine for estimating lower lumbar spine loads during symmetric and asymmetric lifting tasks

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Validation of an OpenSim full-body model with detailed lumbar spine for estimating lower lumbar spine loads during symmetric and asymmetric lifting tasks

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