The human cervical spine motion during rear-impact collisions: A proposed cervical facet injury mechanism during whiplash trauma

Koji Kaneoka*, Koshiro Ono, Satoshi Inami, Naoyuki Ochiai, Koichiro Hayashi

*この研究の対応する著者

研究成果査読

8 被引用数 (Scopus)

抄録

Background. The mechanism of whiplash injury has not been revealed yet. We analyzed in vivo cervical spine motion during simulated rear-end car collisions to clarify the whiplash injury mechanism. Method. The subjects were ten male volunteers. The ethics committee approved the protocol of this study. The subjects sat on a sled that glided backward on inclined rails and crashed into a damper at 8 km/hr. Cineradiography recorded the cervical spine motion during impact and the motion analysis of each vertebra was performed. Findings. During simulated rear-end impacts, torso motion forced the cervical spine to extend from the lowest vertebrae. This early extension motion of lowest cervical vertebrae caused the cervical spine to flex in the early phase. After this initial flexion motion, extension motion started from the lowest motion segment and gradually moved to the upper segments. Approximately 110 ms after impact, while the upper segments were still in the flexion mode, the lower segments have already been extended, creating an S-shaped curvature of the cervical spine. Interpretation. We observed abnormal cervical spine motions during simulated rear-end impacts and consider that this motion may be related to the whiplash injury mechanism.

本文言語English
ページ(範囲)85-97
ページ数13
ジャーナルJournal of Whiplash and Related Disorders
1
1
DOI
出版ステータスPublished - 2002
外部発表はい

ASJC Scopus subject areas

  • 外科
  • 病理学および法医学
  • リハビリテーション

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