Applications of Statics to Biomechanics

  • Nihat Özkaya
  • Margareta Nordin

Abstract

The human body is rigid in the sense that it can maintain a posture, and flexible in the sense that it can change its posture and move. The flexibility of the human body is due primarily to the joints, or articulations, of the skeletal system. The primary function of joints is to provide mobility to the musculoskeletal system. In addition to providing mobility, a joint must also possess a degree of stability. Since different joints have different functions, they possess varying degrees of mobility and stability. Some joints are constructed so as to provide optimum mobility. For example, the construction of the shoulder joint (balland socket) enables the arm to move in all three planes (triaxial motion). However, this high level of mobility is achieved at the expense of reduced stability, increasing the vulnerability of the joint to injuries, such as dislocations. On the other hand, the elbow joint provides movement primarily in one plane (uniaxial motion), but is more stable and less prone to injuries than the shoulder joint. The extreme case of increased stability is achieved at joints that permit no relative motion between the bones constituting the joint. The contacting surfaces of the bones in the skull are typical examples of such joints.

Keywords

Patellar Tendon Muscle Force Achilles Tendon Ground Reaction Force Elbow Joint 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Chaffin, D.B., and Andersson, G.B.J. 1991. Occupational Biomechanics. 2nd ed. New York: John Wiley & Sons.Google Scholar
  2. Cholewicki, J., McGill, S.M., and Norman, R.W. 1995. Comparison of muscle force and joint load form an optimization and EMG-assisted lumbar spine model: Towards development of a hybrid approach. J. Biomechanics 28:321–31.CrossRefGoogle Scholar
  3. Crowninshield, R.D., and Brand, R.A. 1981. A physiologically based criterion on muscle force prediction in locomotion. J. Biomechanics 14:793–801.CrossRefGoogle Scholar
  4. Dul, J., Townsend, M.A., Shiavi, R., and Johnson, G.E. 1984a. Muscular synergism I.On the criteria for load sharing between synergistic muscles. J. Biomechanics 17:663–673.CrossRefGoogle Scholar
  5. Dul, J., Johnson, G.E., Shiavi, R., and Townsend, M.A. 1984b. Muscular synergism II. A minimum-fatigue criterion for load sharing between synergistic muscles. J. Biomechanics 17:663–673.CrossRefGoogle Scholar
  6. Goel, V.K., Weinstein, J.N. 1990. Biomechanics of the Spine: Clinical and Surgical Perspective.: Boston Press, Inc.Google Scholar
  7. Kroemer, K.H.E., Marras, W.S., McGlothlin, J.D., McIntyre, D.R., and Nordin, M. 1990. On the measurement of human strength. Int. J. Industrial Ergonomics 6:199–210.CrossRefGoogle Scholar
  8. LeVeau, B.F. 1992. Williams & Lissner’s Biomechanics of Human Motion. 2nd ed. Philadelphia: W.B. Saunders Company.Google Scholar
  9. McMinn, R.M.H., Hutchings, R.T. 1988. Color Atlas of Human Anatomy. 2nd ed. Chicago: Year Book Medical Publishers Inc.Google Scholar
  10. Nordin, M., Andersson, G.B.J., Pope, M.H. (Eds.) 1997. Musculoskeletal Disorders in the Workplace: Principles & Practice. Philadelphia: MosbyYear Book, Inc.Google Scholar
  11. Nordin, M., and Frankel, V.H. 1989. Basic Biomechanics of the Musculoskeletal System. 2 nd ed. Philadelphia: Lea & Febiger.Google Scholar
  12. Penrod, D.D., Davy, D.T., and Singh, D.P. 1974. An optimization approach to tendon force analysis. J. Biomechanics 7:123–129.CrossRefGoogle Scholar
  13. Roebuck, J.A. 1995. Anthropometric Methods: Designing to Fit the Human Body. Monographs in Human Factors and Ergonomics: Alphonse Chapanis, Series Editor. Santa Monica: Human Factors & Ergonomics Society.Google Scholar
  14. Seireg, A., and Arvikar, R.J. 1973. A mathematical model for evaluation of force in lower extremities of the musculoskeletal system. J. Biomechanics 6:313–326.CrossRefGoogle Scholar
  15. Simon, S.R. (Ed.) 1994. Orthopaedic Basic Science. Rosemont, IL: American Academy of Orthopaedic Surgeons.Google Scholar
  16. Thompson, C.W. 1989. Manual of Structural Kinesiology. 11 th ed. St. Louis, MO: Times Mirror/Mosby.Google Scholar
  17. Wilson, J.R., Corlett, E. N. (Eds.) 1995. Evaluation of Human Work: A Practical Ergonomics Methodology. 2 nd ed. Bristol, UK: Taylor & Francis.Google Scholar
  18. Winter, D.A. 1990. Biomechanics and Motor Control of Human Behavior. 2 nd ed. New York: John Wiley & Sons.Google Scholar
  19. Yamaguchi, G.T., Moran, D.W., and Si, J. 1995. A computationally efficient method for solving the redundant problem in biomechanics. J. Biomechanics 28:999–1005.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1999

Authors and Affiliations

  • Nihat Özkaya
    • 1
  • Margareta Nordin
    • 1
  1. 1.Occupational and Industrial Orthopaedic Center, Hospital for Joint Diseases Orthopaedic InstituteNew York University Medical CenterNew YorkUSA

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