A12 量産車シートを用いた後方被衝突模擬実験における頚椎挙動の特徴(外傷バイオメカニクス)

概要

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We investigate the characteristic behavior of the cervical vertebrae in automobile rear end impact collision simulation with mass production car seat (with headrest), compared with similar experiment with rigid metal seat (without headrest). By the rear end impact, body trunk goes forward and cervical vertebrae start to extend from lower level. But, by the inertia force of head, upper cervical vertebrae behaves flexion movement at first, then pass into hyperextension. Flexion of upper cervical spine and extension of lower cervical spine make whole cervical spine S-shaped sagittal malalignment. This unphysiological malalignment may cause conflict of zygapophysial joint and neck pain originated from that joint. Headrest may control the hyper extension of cervical spine and rear displacement of head, but cannot prevent from unphysiological S-shaped malalignment of cervical spine.
一般社団法人日本機械学会の論文
2007-11-13