Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Variation of Paraspinal Muscle Forces according to the Lumbar Motion Segment Fusion during Upright Stance Posture

직립상태 시 요추 운동분절의 유합에 따른 척추주변 근력의 변화

  • Kim, Young-Eun (Department of Mechanical Engineering, Dakook Univ.) ;
  • Choi, Hae-Won (Graduate School, Department of Mechanical Engineering, Dakook Univ.)
  • 김영은 (단국대학교 기계공학과) ;
  • 최혜원 (단국대학교 기계공학과 대학원)
  • Published : 2010.02.01
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Abstract

For stability analysis of the lumbar spine, the hypothesis presented is that the disc has stress sensors driving feedback mechanism, which could react to the imposed loads by adjusting the contraction of the muscles. Fusion in the motion segment of the lumbar spinal column is believed to alter the stability of the spinal column. To identify this effect finite element (FE) models combined with optimization technique was applied and quantify the role of each muscle and reaction forces in the spinal column with respect to the fusion level. The musculoskeletal FE model was consisted with detailed whole lumbar spine, pelvis, sacrum, coccyx and simplified trunk model. Vertebral body and pelvis were modeled as a rigid body and the rib cage was constructed with rigid truss element for the computational efficiency. Spinal fusion model was applied to L3-L4, L4-L5, L5-S1 (single level) and L3-L5 (two levels) segments. Muscle architecture with 46 local muscles was used as acting directions. Minimization of the nucleus pressure deviation and annulus fiber average axial stress deviation was selected for cost function. As a result, spinal fusion produced reaction changes at each motion segment as well as contribution of each muscle. Longissimus thoracis and psoas major muscle showed dramatic changes for the cases of L5-S1 and L3-L5 level fusion. Muscle force change at each muscle also generated relatively high nucleus pressure not only at the adjacent level but at another level, which can explain disc degeneration pattern observed in clinical study.

Keywords

References

  1. Patwardhan, A. G., Havey, R. M., Meade, K. P., Lee, B. and Dunlap, B., "A Follower Load Increases the Load-Carrying Capacity of the Lumbar Spine in Compression," Spine, Vol. 24, No. 10, pp. 1003-1009, 1999. https://doi.org/10.1097/00007632-199905150-00014
  2. Renner, S. M., Natarajan, R. N., Patwardhan, A. G., Havey, R. M., Voronov, L. I., Guo, B. Y., Andersson, G. B. and An, H. S., "Novel Model to Analyze the Effect of a Large Compressive Follower Pre-load on Range of Motions in a Lumbar Spine," J. of Biomechanics, Vol. 40, No. 6, pp. 1326-1332, 2007. https://doi.org/10.1016/j.jbiomech.2006.05.019
  3. Rohlmann, A., Neller, S., Claes, L., Bergmann, G. and Wilke, H. J., "Influence of a Follower Load on Intradiscal Pressure and Intersegmental Rotation of the Lumbar Spine," Spine, Vol. 26, No. 24, pp. 557-561, 2001. https://doi.org/10.1097/00007632-200112150-00014
  4. Shirazi-Adl, A. and Parnianpour, M., "Load Bearing and Stress Analysis of the Human Spine under a Novel Wrapping Compression Load," Clinical Biomechanics, Vol. 15, No. 10, pp. 718-725, 2000. https://doi.org/10.1016/S0268-0033(00)00045-0
  5. Cholewicki, J., McGill, S. M. and Norman, R. W., "Comparison of Muscle Forces and Joint Load from an Optimization and EMG Assisted Lumbar Spine Model: towards Development of a Hybrid Approach," J. of Biomechanics, Vol. 28, No. 3, pp. 321-331, 1995. https://doi.org/10.1016/0021-9290(94)00065-C
  6. Kim, Y. E. and Kim, S. T, "Stress Sensors Driving a Feedback Mechanism for the Prediction of Paraspinal Muscle Forces during Upright Stance Posture," J. of Biomechanical Science and Engineering, Vol. 3, No. 3, pp. 419-430, 2008. https://doi.org/10.1299/jbse.3.419
  7. Kim, Y. E., Goel, V. K., Lim, T.-H. and Weinstein, J., "Effect of Disc Degeneration at one Level on the Adjacent Level in Axial Mode," Spine, Vol. 16, No. 3, pp. 331-335, 1991. https://doi.org/10.1097/00007632-199103000-00013
  8. Chen, C. S., Cheng, C. K., Liu, C. L. and Lo, W. H., "Stress Analysis of the Disc Adjacent to Interbody Fusion in Lumbar Spine," Medical Engineering & Physics, Vol. 23, No. 7, pp. 483-491, 2001.
  9. Kim, Y. E. and Yun, S. S., "Effect on the Adjacent Motion Segments according to the Artificial Disc Insertion," Journal of Korean Society for Precision Engineering, Vol. 24, No. 8, pp. 122-129, 2007.
  10. White III, A. A. and Panjabi, M. M., "Clinical biomechanics of the Spine," Lippincott Williams & Wilkins, pp. 1-83, 1990.
  11. Pintar, F. A., "The Biomechanics of Spinal Elements," Doctoral Dissertation, Department of Biomedical Engineering, Marquette University, 1986.
  12. Lu, Y. M., Hutton, W. C. and Gharpuray, V. M., "The Effect of Fluid Loss on the Viscoelastic Behavior of the Lumbar Intervertebral Disc in Compression," J. of Biomed. Eng., Vol. 120, No. 1, pp. 48-54, 1998.
  13. Santaguida, P. L. and McGill, M., "The Psoas Major Muscle: A Three-Dimensional Geometric Study," J. Biomechanics, Vol. 28, No. 3, pp. 339-345, 1995. https://doi.org/10.1016/0021-9290(94)00064-B
  14. Penning, L., "Psoas Muscle and Lumbar Spine Stability: A Concept Uniting Existing Controversies," Eur. Spine J., Vol. 9, No. 6, pp. 577-585, 2000. https://doi.org/10.1007/s005860000184
  15. Wai, M. S., Santos, E. R. G., Morcom, R. A. and Fraser, R. D., "Magnetic Resonance Imaging 20 Years After Anterior Lumbar Interbody Fusion," Spine, Vol. 31, No. 17, pp. 1952-1956, 2006 https://doi.org/10.1097/01.brs.0000228849.37321.a8