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在5例新鲜颈椎(C3～T1)上,通过施加最大载荷为2.34N.m 的纯扭矩,使颈椎产生前屈、后伸、右/左侧弯、左/右旋转等运动。每一种运动均进行3次加载/卸载循环,在第3次分级加载时测量椎体的运动。得到的主要参数有:中性区 NZ(Neutral zone);弹性区 EZ(Elastic zone);脊椎运动范围 ROM(Rangeof motion)。分析结果表明:中、下部颈椎各节段的前屈运动和侧弯运动的幅度都从上至下依次减小,其中前屈运动为8.4°～4.0°,侧弯运动为6.4°～3.0°;C3～C7各节段后伸运动幅度较接近,为3.7°～3.2°,而 C7～T1为2.1°;各节段的旋转运动幅度也很接近,为7.4°～6.7°。
In 5 cases of fresh cervical spine (C3 ~ T1), by applying the maximum load of 2.34N.m of pure torque, the cervical spine flexion, extension, right / left bend, left / right rotation and other sports. Each exercise was performed 3 load / unload cycles, and the vertebral body movement was measured at the 3rd fractional loading. The main parameters obtained are: Neutral zone NZ; Elastic zone EZ; Range of motion ROM. The results showed that the amplitudes of flexion and flexion movements of the cervical spine segments decreased from top to bottom in the middle and lower cervical spine segments, of which the flexion movements ranged from 8.4 ° to 4.0 ° and the flexion movements ranged from 6.4 ° to 3.0 ° The range of C3 ~ C7 stretch was 3.7 ° ~ 3.2 °, while the range of C7 ~ T1 was 2.1 °. The rotation range of each section was also close to 7.4 ° ~ 6.7 °.