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The Influence of End Condition on Human Cervical Spine Injury Mechanisms
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Event:
Stapp Car Crash Conference
Language:
English
Abstract
The passive combined flexion and axial loading responses of the unembalmed human cervical spine were measured in a dynamic test environment. The influence of end condition (the degree of constraint imposed on the head by the contact surface) was varied to determine its effect on observed column stiffness and on failure modes of the cervical spine. Multi-axis load cells were used to completely describe the forces and moments developed in the specimen. Twenty three specimens were studied. The Hybrid III neckform performance was assessed to determine its suitability as a mechanical simulator of the neck during head impact. Changes in end condition produced significant changes in axial stiffness in both the Hybrid III neckform and the cadaver neck. The mode of injury also varied as a function of end condition in a repeatable fashion. Separation of injuries based upon imposed end condition identified groups with significantly different axial load to failure. These results also suggest that the risk of cervical injury may be strongly dependent on the degree of head constraint imposed by the contact surface, and that injury environments should be designed to minimize this constraint.
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Authors
Citation
Nightingale, R., Doherty, B., Myers, B., McElhaney, J. et al., "The Influence of End Condition on Human Cervical Spine Injury Mechanisms," SAE Technical Paper 912915, 1991, https://doi.org/10.4271/912915.Also In
References
- Pintar F. Sances A. Jr. Yoganandan N. Reinartz J. Maiman D.J. Suh J.K. Unger G. Cusick J.F. Larson S.J. “Biodynamics of the Total Human Cervical Spine,” The 32nd Stapp Car Crash Conference 55 72 1990
- McElhaney J.H. Doherty B.J. Paver J.G. Myers B.S. Gray L. “Combined Bending and Axial Loading Responses of the Human Cervical Spine,” The 32nd Stapp Car Crash Conference 21 28 1988
- Yoganandan Sances A. N. Jr. Pintar F. “Biomechanical Evaluation of the Axial Compressive Responses of the Human Cadaveric and Manikin Necks,” Journal of Biomechanical Engineering 111 250 255 1989
- Alem N.M. Nusholtz G.S. Melvin J.W. “Head and Neck Response to Axial Impacts,” The 28th Stapp Car Crash Conference 275 287 1984
- Nusholtz Huelke D.E. Lux P. Alem N.M. Montalvo F. “Cervical Spine Injury Mechanisms,” The 27th Stapp Car Crash Conference 179 197 1983
- Morgan R.M. Marcus J.H. Eppinger R.H. “Side Impact-The Bioficlelity of NHTSA's Proposed XTD and Efficacy of TTl,” The 25th Stapp Car Crash Conference 301 1981
- White A.A. Panjabi M.M. Biomechanics of the Spine Lippincott Publishers Philadelphia 1978
- Doherty B.J. McElhaney J.H. anti Myers B.S. ‘The Effect of End Conditions on the Responses of the Cervical Spine to Complex Loading,” Journal of Biomechanics, submitted for review 1991
- McElhaney J.H. Paver J.G. McCrackin H.J. Maxwell G.M. “Cervical Spine Compression Responses” The 27th Stapp Car Crash Conference 163 177 1983
- Torg J.S. Athletic Injuries to the Head, Neck and Face Lea and Febiger Philadelphia 1982
- Roaf R. “A Study of the Mechanics of Spinal Injury,” Journal of Bone and Joint Surgery 42B 810 823 1960
- Myers B.S. McElhaney J.H. Doherty B.J. Paver J.G. Gray L. “The Role of Torsion in Cervical Spinal Injury” Spine 16 8 870 874 1991
- Hodgson V.R. Thomas L.M. “Mechanisms of Cervical Spine Injury During Impact to the Protected Head,” Society of Automotive Engineers Transections, Paper #801300 17 42 1980
- Bauze R.J. Ardran G.M. “Experimental Production of Forward Dislocation of the Human Cervical Spine.” The Journal of Bone and Joint Surgery 60B 239 245 1978
- Yoganandan N. Sauces A. Jr. Maiman D.J. Myk-lebust J.B. Pech P. Larson S.J. “Experimental Spinal Injuries with Vertical Impact,” Spine 11 9 S55 860 1986
- Liu Y.K. Dai Q.G. “The Second Stillest Axis of A Beam Column: Implications for Cervical Spine Trauma.” Journal of Biomechanical Engineering 111 122 127 1989
- Mertz H.J. arid Patrick L.M. “Strength and Response of the Human Neck,” The 15th Stapp Car Crash Conference, SAE Paper No. 710855 1971
- McElhaney J.H. Snyder R.G. States J.D. Gabrielsen M.A. “Biomechanical Analysis of Swimming Pool Injuries.” Society of Automotive Engineers, paper no. 790131 47 53 1979
- Foster J.K. Kortge J.O. Wolanin M.J. ’Hybrid III-A Biomechanically-Based Crash Test Dummy.” The 21st Stapp Car Crash Conference 975 1014 1977
- Wismans J. Philippens M. van Oorschot E. Kallieris D. ancl Mattern R. “Comparison of Human Volunteer and Cadaver Head-Neck Response in Frontal Flexion.” The 31st Stapp Car Crash Conference 1 11 1987