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On the Role of Cervical Facet Joints in Rear End Impact Neck Injury Mechanisms
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Abstract
After a rear end impact, various clinical symptoms are often seen in car occupants (e.g. neck stiffness, strain, headache). Although many different injury mechanisms of the cervical spine have been identified thus far, the extent to which a single mechanism of injury is responsible remains uncertain. Apart from hyperextension or excessive shearing, a compression of the cervical spine can also be seen in the first phase of the impact due to ramping or other mechanical interactions between the seat back and the spine.
It is hypothesized that this axial compression, together with the shear force, are responsible for the higher observed frequency of neck injuries in rear end impacts versus frontal impacts of comparable severity. The axial compression first causes loosening of cervical ligaments making it easier for shear type soft tissue injuries to occur.
To test this hypothesis, an in vitro experiment was designed to investigate the theory that axial compression reduces the shear stiffness when the cervical spine is moved due to a rear-end impact. Specimens from C1-T1 were tested. Results showed that shear stiffness values were reduced significantly with increased axial compressions. More dynamic tests are needed to further test this hypothesis for the rear-end impact neck injury mechanism. Also, investigations of soft tissue injuries in rear-end crash victims are necessary to guarantee the merit of this hypothesis.
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Authors
- King H. Yang - Wayne State Univ.
- Paul C. Begeman - Wayne State Univ.
- Marcus Muser - Swiss Federal Institute of Technology and University of Zürich
- Peter Niederer - Swiss Federal Institute of Technology and University of Zürich
- Felix Walz - Swiss Federal Institute of Technology and University of Zürich
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Citation
Yang, K., Begeman, P., Muser, M., Niederer, P. et al., "On the Role of Cervical Facet Joints in Rear End Impact Neck Injury Mechanisms," SAE Technical Paper 970497, 1997, https://doi.org/10.4271/970497.Also In
References
- Balla, J.I. 1980 “The Late Whiplash Syndrome” Aust NZ J. Surg 50 6 610 614
- Barnsley, L. Lord, S.M. Wallis, B.J. Bogduk, N. 1995 “The Presence of Cervical Zygapophyseal Joint Pain after Whiplash” Spine 20 20 26
- Cavanaugh, J.M. 1996 “A Proposed Role for Facet Joints in Neck Pain in Low to Moderate Speed Rear End Impacts Part II: Neuroanatomy and Neurophysiology” 6th Injury Prevention Through Biomechanics Symposium May 9-10 1996 WSU 65 71
- Matsushita, T. Sato, T.B. Hirabayashi, K. Fujimura, S. Asaszuma, T. 1994 “X-ray Study of the Human Neck Motion Due to Head Inertia Loading” Proc. 38th Stapp Car Crash Conf. 55 64 SAE paper no. 942208
- McConnell, W.E. Howard, R.P. Guzman, H.M. Boniar, J.B. Raddin, J.H. Benedit, J.V. Smith, H.L. Hatsell, C.P. 1993 “Analysis of Human Test Subject Kinematic Responses to Low Velocity Rear-End Impacts” SAE Paper No. 930889
- McConnell, W.E. Howard, R.P. Van Poppel, J. Krause, R. Guzman, H.M. Boniar, J.B. Raddin, J.H. Benedit, J.V. Hatsell, C.P. 1995 “Human Head and Neck Kinematics after Low Velocity Rear-End Impacts - Understanding “Whiplash” Proc. 39th Stapp Car Crash Conf. 215 238 SAE Paper No. 952724
- Moroney, S.P. Schultz, A.B. Miller, J.A.A. Andersson, G.B.J. 1988 “Load-displacement properties of Lower Cervical Spine Motion Segments” J. Biomechanics 21 769 779
- O'Neill, B. Haddon, W. Jr. Kelley, A.B. Sorenson, W.W. 1972 “Automobile Head Restraints: Frequency of Neck Injury Insurance Claims in Relation to the Presence of Head Restraints” Am. J. Pub. Health 62 399 406
- Panjabi, M.M. Summers, D.J. Pelker, R.R. Videman, T. Friedlaender, G.E. Southwick, W.O. 1986 “Three Dimensional load-displacement Curves Due to Forces on the Cervical Spine” J. Orthopaedic Research 4 152 161
- Pearce, J.M.S. 1989 “Whiplash Injury: A Reappraisal” J. Neurosurg. Psychiatry 52 1329 1331
- Viano, D.C. 1992 “Influence of Seatback Angle on Occupant Dynamics in Simulated Rear-End Impacts” SAE Paper No. 922521
- Walz, F.H. 1993 Biomechanical Aspects of Cervical Spine Injuries” First European Congress of Orthopaedics Paris April 21-23
- Yang, K.H. Begeman, P.C. 1996 “A Proposed Role for Facet Joints in Neck Pain in Low to Moderate Speed Rear End Impacts Part I: Biomechanics” 6th Injury Prevention Through Biomechanics Symposium May 9-10 1996 WSU 59 63