TY  - JOUR
AU  - Zhu, Rui
A2  - Zhu, Rui
A2  - Zander, Thomas
A2  - Dreischarf, Marcel
A2  - Duda, Georg Norbert
A2  - Rohlmann, Antonius
A2  - Schmidt, Hendrik
DB  - BISp
DP  - BISp
KW  - Biomechanik
KW  - Lendenwirbelsäule
KW  - MiSpEx
KW  - Modell, biomechanisches
KW  - Modell, mathematisches
KW  - Muskelkraft
KW  - Prognose
KW  - Rücken
KW  - Rückenschmerz
KW  - Sportmedizin
KW  - Wirbelsäule
LA  - eng
TI  - Considerations when loading spinal finite element models with predicted muscle forces from inverse static analyses
TT  - Erwägungen beim Laden von Finite-Elemente-Modellen des Rückens mit vorausgesagten Muskelkräften aus inversen statische Analysen
PY  - 2013
N2  - Mostly simplified loads were used in biomechanical finite element (FE) studies of the spine because of a lack of data on muscular physiological loading. Inverse static (IS) models allow the prediction of muscle forces for predefined postures. A combination of both mechanical approaches - FE and IS - appears to allow a more realistic modeling. However, it is unknown what deviations are to be expected when muscle forces calculated for models with rigid vertebrae and fixed centers of rotation, as generally found in IS models, are applied to a FE model with elastic vertebrae and discs. The aim of this study was to determine the effects of these disagreements. Muscle forces were estimated for 20° flexion and 10° extension in an IS model and transferred to a FE model. The effects of the elasticity of bony structures (rigid vs. elastic) and the definition of the center of rotation (fixed vs. non-fixed) were quantified using the deviation of actual intervertebral rotation (IVR) of the FE model and the targeted IVR from the IS model. For extension, the elasticity of the vertebrae had only a minor effect on IVRs, whereas a non-fixed center of rotation increased the IVR deviation on average by 0.5° per segment. For flexion, a combination of the two parameters increased IVR deviation on average by 1° per segment. When loading FE models with predicted muscle forces from IS analyses, the main limitations in the IS model - rigidity of the segments and the fixed centers of rotation - must be considered. Verf.-Referat
L2  - https://dx.doi.org/10.1016/j.jbiomech.2013.03.003
DO  - 10.1016/j.jbiomech.2013.03.003
SP  - S. 1376–1378
SN  - 0021-9290
JO  - Journal of biomechanics
IS  - 7
VL  - 46
M3  - Elektronische Ressource (online)
M3  - Gedruckte Ressource
ID  - PU201503002430
ER  -