Dynamic cervical spine loading can produce facet capsule injury. Despite a large proportion of neck pain being attributable to the C2/C3 facet capsule, potential mechanisms are not understood. This study replicated low-speed frontal and rear-end traffic collisions in occiput-C3 human cadaveric cervical spine specimens and used kinematic and full-field strain analyses to assess injury. Specimens were loaded quasi-statically in flexion and extension before and after dynamic rotation of C3 at 100 deg/s. Global kinematics in the sagittal plane were tracked at 1 kHz, and C2/C3 facet capsule full-field strains were measured. Dynamic loading did not alter the kinematics from those during quasi-static (QS) loading, but maximum principal strain (MPS) and shear strain (SS) were significantly higher (p = 0.028) in dynamic flexion than for the same quasi-static conditions. The full-field strain analysis demonstrated that capsule strain was inhomogeneous, and that the peak MPS generally occurred in the anterior aspect and along the line of the C2/C3 facet joint. The strain magnitude in dynamic flexion continued to rise after the rotation of C3 had stopped, with a peak MPS of 12.52 ± 4.59% and a maximum SS of 5.34 ± 1.60%. The peak MPS in loading representative of rear-end collisions approached magnitudes previously shown to induce pain in vivo, whereas strain analysis using linear approaches across the facet joint was lower and may underestimate injury risk compared to full-field analysis. The time at which peak MPS occurred suggests that the deceleration following a collision is critical in relation to the production of injurious strains within the facet capsule.
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December 2016
Research-Article
Upper Cervical Spine Loading Simulating a Dynamic Low-Speed Collision Significantly Increases the Risk of Pain Compared to Quasi-Static Loading With Equivalent Neck Kinematics
Timothy P. Holsgrove,
Timothy P. Holsgrove
Department of Bioengineering,
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: thols@seas.upenn.edu
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: thols@seas.upenn.edu
Search for other works by this author on:
Nicolas V. Jaumard,
Nicolas V. Jaumard
Department of Neurosurgery,
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: njaumard@gmail.com
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: njaumard@gmail.com
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Nina Zhu,
Nina Zhu
Department of Bioengineering,
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: nzhu@seas.upenn.edu
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: nzhu@seas.upenn.edu
Search for other works by this author on:
Nicholas S. Stiansen,
Nicholas S. Stiansen
Department of Bioengineering,
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: nsti@seas.upenn.edu
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: nsti@seas.upenn.edu
Search for other works by this author on:
William C. Welch,
William C. Welch
Department of Neurosurgery,
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: william.welch@uphs.upenn.edu
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: william.welch@uphs.upenn.edu
Search for other works by this author on:
Beth A. Winkelstein
Beth A. Winkelstein
Department of Bioengineering,
School of Engineering
and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104;
School of Engineering
and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104;
Department of Neurosurgery,
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: winkelst@seas.upenn.edu
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: winkelst@seas.upenn.edu
Search for other works by this author on:
Timothy P. Holsgrove
Department of Bioengineering,
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: thols@seas.upenn.edu
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: thols@seas.upenn.edu
Nicolas V. Jaumard
Department of Neurosurgery,
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: njaumard@gmail.com
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: njaumard@gmail.com
Nina Zhu
Department of Bioengineering,
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: nzhu@seas.upenn.edu
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: nzhu@seas.upenn.edu
Nicholas S. Stiansen
Department of Bioengineering,
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: nsti@seas.upenn.edu
School of Engineering and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104
e-mail: nsti@seas.upenn.edu
William C. Welch
Department of Neurosurgery,
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: william.welch@uphs.upenn.edu
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: william.welch@uphs.upenn.edu
Beth A. Winkelstein
Department of Bioengineering,
School of Engineering
and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104;
School of Engineering
and Applied Science,
University of Pennsylvania,
210 South 33rd Street,
Room 240 Skirkanich Hall,
Philadelphia, PA 19104;
Department of Neurosurgery,
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: winkelst@seas.upenn.edu
Pennsylvania Hospital,
University of Pennsylvania,
Washington Square West Building,
235 South 8th Street,
Philadelphia, PA 19106
e-mail: winkelst@seas.upenn.edu
1Corresponding author.
Manuscript received February 10, 2016; final manuscript received September 8, 2016; published online November 3, 2016. Assoc. Editor: Brian D. Stemper.
J Biomech Eng. Dec 2016, 138(12): 121006 (10 pages)
Published Online: November 3, 2016
Article history
Received:
February 10, 2016
Revised:
September 8, 2016
Citation
Holsgrove, T. P., Jaumard, N. V., Zhu, N., Stiansen, N. S., Welch, W. C., and Winkelstein, B. A. (November 3, 2016). "Upper Cervical Spine Loading Simulating a Dynamic Low-Speed Collision Significantly Increases the Risk of Pain Compared to Quasi-Static Loading With Equivalent Neck Kinematics." ASME. J Biomech Eng. December 2016; 138(12): 121006. https://doi.org/10.1115/1.4034707
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