Degenerative spondylolisthesis is the result of longstanding intersegmental instability at the lumbar motion segment.
退行性椎体滑移是腰椎活动节段长时间节段间不稳定的结果。
Objective: To investigate the effects of variations in vertebral endplate concavity on the mechanical behaviors of the lumbar motion segment.
目的：研究终板凹陷程度变化对腰椎运动节段生物力学影响。
Objective: To establish a digital model for reconstruction and three-dimensional visualization of upper cervical spinal motion segment from ct images.
目的：寻求连续CT断层图像重建上颈椎运动节段数字模型及三维可视化的方法。
Conclusion the disc degeneration and facet joint osteoarthritis are the main factors affecting on the stability of the kinematics of lumbar motion segment.
结论腰椎间盘退变和腰椎关节突关节骨性关节炎可影响腰椎运动节段的稳定性。
OBJECTIVE: Three-dimensional finite element method was used to observe and analysis the stress conduction of artificial lumbar intervertebral disc in lumbar motion segment.
目的：通过三维有限元的方法观察分析人工腰椎间盘在腰椎运动节段中的应力传导作用。
Study Design. Biomechanical roles of anterior and posterior portions of the disc (AD and PD, respectively) in governing posterior facets (PF) behavior of a C5-C6 motion segment.
研究设计：研究椎间盘前、后部分（分别为AD和PD）在调节C5-C6运动节段后方小关节面（PF）活动的生物力学作用。
Significant reductions of disc height were found at 3 motion segments and of DCSA at 11 segments after compression, but these changes were never seen in the same motion segment.
施加轴向负荷后，椎间盘的厚度在三个活动平面明显减少，同时，硬脊膜囊横断面积在11个平面减少，但不会出现在相同运动平面。
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.
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。
Conclusion: QTVI can accurately differentiate abnormal motion segment and is a non invasive and quantitative method to assess systolic function of left ventricular regional myocardium.
结论：QT VI技术可准确识别运动异常节段，是无创评价局部心肌收缩功能定量、精确的方法。
Results: The FJ play an important role in load transmission; they provide a posterior load-bearing helper, stabilizing the motion segment in flexion and extension and also restricting axial rotation.
结果：关节突关节在传导脊柱负荷中扮演重要角色，它们对脊柱后侧提供负荷支持，在脊柱屈伸活动中其稳定作用，并能限制脊柱的轴向旋转作用。
Results: The FJ play an important role in load transmission; they provide a posterior load-bearing helper, stabilizing the motion segment in flexion and extension and also restricting axial rotation.
结果：关节突关节在传导脊柱负荷中扮演重要角色，它们对脊柱后侧提供负荷支持，在脊柱屈伸活动中其稳定作用，并能限制脊柱的轴向旋转作用。
应用推荐