Xu Ming, Yang James, Lieberman Isador, Haddas Ram
Human-Centric Design Research Laboratory, Mechanical Engineering, Texas Tech University, Lubbock, TX, USA.
Human-Centric Design Research Laboratory, Mechanical Engineering, Texas Tech University, Lubbock, TX, USA.
Comput Biol Med. 2017 May 1;84:53-58. doi: 10.1016/j.compbiomed.2017.03.018. Epub 2017 Mar 22.
Finite element analysis was used to investigate the responses of five healthy subjects and five adult degenerative scoliosis (ADS) subjects to cyclic vibration. The dynamic responses of the healthy and scoliotic spines to the sinusoidal cyclic vibrations have been investigated in previous studies by simulation or experimental approaches. However, no simulation or experimental results were available for the ADS subjects. The effect of the ADS on the vibrational characteristics of spines remained unknown. The objective of this study was to compare differences of the dynamic responses to the cyclic vibration input between the healthy subjects and subjects with ADS. Based on the simulations results in this study, the scoliotic spines are more sensitive to the cyclic vibrations than the healthy spines. More resonant frequencies were predicted in the scoliotic spines than the healthy spines. The scoliotic deformity in the spine was to make the vibrational response of the spine significantly more complex at the apical scoliotic region. This study suggested that ADS could severely increase spinal response to the cyclic vibrations, which could potentially lead to further scoliotic deformity in the spine.
采用有限元分析方法研究了5名健康受试者和5名成人退变性脊柱侧凸（ADS）受试者对周期性振动的反应。以往的研究通过模拟或实验方法研究了健康脊柱和脊柱侧凸脊柱对正弦周期性振动的动态反应。然而，尚无关于ADS受试者的模拟或实验结果。ADS对脊柱振动特性的影响仍然未知。本研究的目的是比较健康受试者和ADS受试者对周期性振动输入的动态反应差异。基于本研究的模拟结果，脊柱侧凸的脊柱比健康的脊柱对周期性振动更敏感。脊柱侧凸的脊柱比健康的脊柱预测出更多的共振频率。脊柱中的脊柱侧凸畸形使脊柱在脊柱侧凸顶点区域的振动反应明显更加复杂。本研究表明，ADS可严重增加脊柱对周期性振动的反应，这可能会导致脊柱进一步出现脊柱侧凸畸形。
