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Effect of Head-Neck Position on Cervical Facet Stretch of Post Mortem Human Subjects during Low Speed Rear End Impacts
Technical Paper
2004-22-0015
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English
Abstract
The purpose of this study was to determine the effect of head-neck position on cervical facet stretch during low speed rear end impact. Twelve tests were conducted on four Post Mortem Human Subjects (PMHS) in a generic bucket seat environment. Three head positions, namely Normal (neutral), Zero Clearance between the head and head restraint, and Body Forward positions were tested. A high-speed x-ray system was used to record the motion of cervical vertebrae during these tests. Results demonstrate that: a) The maximum mean facet stretch at head restraint contact occurs at MS4 and MS5 for the Body Forward condition, b) The lower neck flexion moment, prior to head contact, shows a non-linear relationship with facet stretch, and c) “Differential rebound” during rear end impact increases facet stretch.
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Authors
- Srini Sundararajan - Ford Motor Company
- Priya Prasad - Ford Motor Company
- Constantine K. Demetropoulos
- Scott Tashman
- Paul C. Begeman - Bioengineering Center, Wayne State University
- King H. Yang - Bioengineering Center, Wayne State University
- Albert I. King - Bioengineering Center, Wayne State University
Citation
Sundararajan, S., Prasad, P., Demetropoulos, C., Tashman, S. et al., "Effect of Head-Neck Position on Cervical Facet Stretch of Post Mortem Human Subjects during Low Speed Rear End Impacts," SAE Technical Paper 2004-22-0015, 2004, https://doi.org/10.4271/2004-22-0015.Also In
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