The acute response of the nucleus pulposus of the cervical intervertebral disc to three supine postures in an asymptomatic population
The acute response of the nucleus pulposus of the cervical intervertebral disc to three supine postures in an asymptomatic population
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DOI：
10.1016/j.msksp.2019.07.002
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发表时间：
2019-12-01
影响因子：
2.3
通讯作者：
McEwan, Islay
中科院分区：
文献类型：
--
作者：
Elmaazi, Areej;Morse, Christopher, I;McEwan, Islay
背景：动态椎间盘模型指的是腰椎间盘的位置受身体姿势和运动控制的能力。对腰椎间盘的研究表明，腰椎间盘的前后部运动与脊柱的姿势有关。这项研究的目的是评估尽管结构不同，颈椎间盘对弯曲和伸展姿势的反应是否与腰椎间盘相似。方法：重复测量研究。25名无症状参与者(年龄：33.7+/-9.1岁)自愿参加。使用Esaote 0.2T磁共振成像仪进行仰卧位扫描。参与者躺着，颈椎最初处于中立状态，然后是屈曲，最后是伸展。结果：颈椎位置的改变与C5-6和C6-7的后路髓核位置显著相关(p<；0.01)。后位测试显示C5-6屈曲与伸展时髓核后方位置有显著差异(p=0.02)。在C6-7节段，中立位与屈曲位之间、屈曲与后伸位之间也有显著差异(p=0.001.0 5)。结论：颈椎后髓核受脊柱负荷的影响，与动态椎间盘模型的概念一致。
Background: The dynamic disc model refers to the ability of a spinal disc's position to be manipulated by body postures and movements. Research on lumbar discs has indicated movement of the anterior and posterior disc that correlates with posture of the spine. The aim of this study was to assess whether, despite its structural differences, the cervical disc responds to flexed and extended postures in a similar fashion to the lumbar disc.Method: A repeated measures study. Twenty five asymptomatic participants (age: 33.7 +/- 9.1 years) volunteered. Scans were performed in supine using an Esaote 0.2T magnetic resonance imaging scanner. Participants lay with their cervical spine initially placed in neutral, followed by flexion and finally extension. The position of the posterior disc nucleus pulposus at C5-6 and C6-7 was measured against a vertical line connecting the posterior vertebral bodies above and below each disc.Results: Changes in cervical spine position were associated with significant changes in posterior disc nucleus pulposus position at both C5-6 and C6-7 (p < 0.01 for both). Post hoc testing showed a significant difference in posterior disc nucleus pulposus position at C5-6 between flexion and extension (p = 0.02). There was similarly a significant change at C6-7 between neutral and flexion (p= 0.001), and between flexion and extension (p = 0.02).Conclusions: These results indicate that the cervical posterior nucleus pulposus is affected by spinal loading, consistent with the concept of the dynamic disc model.