Dynamic cervical vertebral motion of female and male volunteers and analysis of its interaction with head/neck/torso behavior during low‐speed rear impact

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Sato, Fusako¹; Nakajima, Taichi¹; Ono, Koshiro¹; Svensson, Mats²; Brolin, Karin²; Kaneoka, Koji³

Dynamic cervical vertebral motion of female and male volunteers and analysis of its interaction with head/neck/torso behavior during low‐speed rear impact

Proceedings of the 2014 International IRCOBI Conference on the Biomechanics of Injury

Affiliations

¹Japan Automobile Research Institute (JARI)

²Chalmers University

³Waseda University
Abstract and keywords

The purpose of this study was to clarify the characteristics of dynamic head/neck/torso and cervical vertebral motion for females and males in a rear impact by reanalyzing two series of rear impact sled tests. One was a test series with 12 males and 8 females, the latter not previously published. Whole body visual motion was measured by a high speed video camera. The second series was conducted with 4 males and 2 females. Cervical vertebral motion was measured by cineradiography, as well as visual motion through a highspeed video camera. The general characteristics of female visual motions were derived from the two test series. Cervical vertebral motion was then investigated.

The females had a peak flexion of the head relative to neck link, defined as a line between T1 and the occipital condyle, while the neck link was extension at the time of peak head flexion. On the other hand, the males had flexion in both the head relative to neck link and neck link relative to T1 up to 100ms. Likewise, the females had larger flexion in the upper vertebral segments and larger extension in lower vertebral segments, when analysing the cervical spine motion. The cineradiography data showed the same tendency as that of the overall neck motion and supported that the head relative to neck link and neck link relative to T1 indicated Sshape deformation of the neck.

Keywords: Whiplash, Rear Impacts, Volunteers, Neck, Cervical vertebral motion
Links

URL: http://www.ircobi.org/downloads/irc14/pdf_files/31.pdf

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Cited By (8)

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2015	Brolin K, Östh J, Svensson M, Sato F, Ono K, Linder A, Kullgren A. Aiming for an average female virtual human body model for seat performance assessment in rear-end impacts. In: Proceedings of the 24th International Technical Conference on the Enhanced Safety of Vehicles (ESV). June 8-11, 2015; Gothenburg, Sweden.
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2015	Sato F, Nakajima T, Ono K, Svensson M, Kaneoka K. Characteristics of dynamic cervical vertebral kinematics for female and male volunteers in low‐speed rear impact, based on quasi‐static neck kinematics. In: Proceedings of the 2015 International IRCOBI Conference on the Biomechanics of Injury. September 9-11, 2015; Lyon, France.261-277.
2021	Valdano M, Jiménez-Octavio JR, Vives-Torres CM, López-Valdés FJ, Pipkorn B. Assessment of madymo active human body model kinematics and dynamics by means of human volunteer response at low-speed frontal impacts. In: Proceedings of the 2021 International IRCOBI Conference on the Biomechanics of Injury. September 8-10, 2021; Online.122-135.
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2020	Shen D. Investigation of Whiplash Associated Disorders Using Finite Element Neck Models With Active Musculature in Frontal, Rear and Lateral Impact [Master's thesis]. University of Waterloo; 2020.