Representation of passive spinal element contributions to in vitro flexion-extension using a polynomial model: illustration using the porcine lumbar spine.
A polynomial modeling approach was developed to describe the contribution of individual passive spinal elements to the lumbar spinal motion segment flexion-extension motion. Flexion-extension moment-angle curves from porcine lumbar spines tested using a robotic testing system were described using sixth-order polynomials; the polynomials describing different dissection conditions were subtracted to describe the contribution of individual spinal elements to the motion segment flexion-extension properties. This modeling approach is a powerful and straightforward method for representing the mechanics of individual spinal tissues in biomechanical models and could easily be expanded to incorporate other features such as axial load.
Dickey
James P
JP
Department of Human Biology and Nutritional Sciences, University of Guelph, Guelph, Ont., Canada N1G 2W1. jdickey@uoguelph.ca
Gillespie
Kevin A
KA
D000818:Animals; D003198:Computer Simulation; D004548:Elasticity; D066298:In Vitro Techniques; D008159:Lumbar Vertebrae / Q000502:physiology* / Q000601:surgery; D008954:Models, Biological; D009038:Motion; D010812:Physical Stimulation / Q000295:instrumentation / Q000379:methods; D011187:Posture / Q000502:physiology*; D012371:Robotics / Q000295:instrumentation / Q000379:methods; D012399:Rotation; D013552:Swine; D019415:Torque