通过建立脊柱前屈的力学模型，定量计算腰骶椎间盘承受的应力。
Based on mechanics model of spinal flexion, stress upon lumber intervertebral disc was quantitatively calculated.
方法采用脊柱活动节段的三维有限元模型分析了脊柱在直立位、前屈位和后伸位的应力分布情况。
Methods Stress distribution of the spine in the upright, flexion and extension positions was analyzed using a three-dimensional finite element model of the spinal motion segment.
结论：下颈椎在前屈状态时局部应力增高，与颈椎病的发病机制有一定关系。
Conclusion the high part stress of lower cervical spine is relative to the cause of cervical spondylosis.
术后观察小腿和足部痛觉，踝及足趾的跖背屈运动，足背动脉搏动并行膝侧方应力试验。
Postoperative algesia on the leg and foot, active flexion and extension of the malleolus, toe and phalanxes, and the lateral stress test of the knee were observed.
正常生理状态下斜扳，后伸位应力大于前屈位而小于自然中立位。
Under normal physiologic condition, the stress in posterior extension is greater than that in anterior flexion, but less than in neutral position.
运用颈椎周围不同肌肉对颈椎作用力的变化，模拟正常活动范围内颈椎前屈、后伸、侧屈、旋转等多种工况。分别计算并得出相应载荷下钩椎关节、小关节应力值。
With the changing of muscular force, the movements such as flexion, extension, lateroversion and rotation were imitated, and the stress was calculated under different loads, respectively.
髓核摘除模型在前屈、后伸、旋转时小关节的应力均增加。
Both facet joints, especially the left of the intact model produced larger stresses in right rotation.
髓核摘除模型在前屈、后伸、旋转时小关节的应力均增加。
Both facet joints, especially the left of the intact model produced larger stresses in right rotation.
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