A biologically-assisted curved muscle model of the lumbar spine: Model structure.
Biomechanical models have been developed to assess the spine tissue loads of individuals. However, most models have assumed trunk muscle lines of action as straight-lines, which might be less reliable during occupational tasks that require complex lumbar motions. The objective of this study was to describe the model structure and underlying logic of a biologically-assisted curved muscle model of the lumbar spine.



The developed model structure including curved muscle geometry, separation of active and passive muscle forces, and personalization of muscle properties was described. An example of the model procedure including data collection, personalization, and data evaluation was also illustrated.



Three-dimensional curved muscle geometry was developed based on a predictive model using magnetic resonance imaging and anthropometric measures to personalize the model for each individual. Calibration algorithms were able to reverse-engineer personalized muscle properties to calculate active and passive muscle forces of each individual.



This biologically-assisted curved muscle model will significantly increase the accuracy of spinal tissue load predictions for the entire lumbar spine during complex dynamic occupational tasks. Personalized active and passive muscle force algorithms will help to more robustly investigate person-specific muscle forces and spinal tissue loads.
Biodynamics Laboratory, Spine Research Institute, The Ohio State University, Department of Integrated Systems Engineering, 1971 Neil Avenue, 210 Baker Systems Engineering, Columbus, OH 43210, USA. Electronic address: hwang.285@osu.edu.
Jaejin
J
Hwang
Biodynamics Laboratory, Spine Research Institute, The Ohio State University, Department of Integrated Systems Engineering, 1971 Neil Avenue, 210 Baker Systems Engineering, Columbus, OH 43210, USA. Electronic address: knapik.1@osu.edu.
Gregory G
GG
Knapik
Biodynamics Laboratory, Spine Research Institute, The Ohio State University, Department of Integrated Systems Engineering, 1971 Neil Avenue, 210 Baker Systems Engineering, Columbus, OH 43210, USA. Electronic address: dufour.8@osu.edu.
Jonathan S
JS
Dufour
Biodynamics Laboratory, Spine Research Institute, The Ohio State University, Department of Integrated Systems Engineering, 1971 Neil Avenue, 210 Baker Systems Engineering, Columbus, OH 43210, USA. Electronic address: aurand.20@osu.edu.
Alexander
A
Aurand
Department of Family Medicine, The Ohio State University, Martha Moorehouse Medical Plaza, 2050 Kenny Dr., Columbus, OH 43210, USA. Electronic address: Tom.Best@osumc.edu.
Thomas M
TM
Best
Department of Orthopeadics, College of Medicine, The Ohio State University, Columbus, OH 43210, USA. Electronic address: Safdar.Khan@osumc.edu.
Safdar N
SN
Khan
Department of Neurological Surgery, The Ohio State University, Columbus, OH 43210, USA. Electronic address: Ehud.Mendel@osumc.edu.
Ehud
E
Mendel
Biodynamics Laboratory, Spine Research Institute, The Ohio State University, Department of Integrated Systems Engineering, 1971 Neil Avenue, 210 Baker Systems Engineering, Columbus, OH 43210, USA. Electronic address: marras.1@osu.edu.
William S
WS
Marras
D000465:Algorithms; D001696:Biomechanical Phenomena; D003198:Computer Simulation; D006801:Humans; D008159:Lumbar Vertebrae / Q000502:physiology*; D008161:Lumbosacral Region / Q000502:physiology; D008954:Models, Biological; D018482:Muscle, Skeletal / Q000502:physiology*; D016474:Weight-Bearing / Q000502:physiology*
Biomechanical model; Curved muscle; Model structure; Personalization; Spine