Related Experiment Video
Updated: Jun 24, 2026

Precision Measurements and Parametric Models of Vertebral Endplates
Published on: September 17, 2019
Material property sensitivity analysis on resonant frequency characteristics of the human spine
Li-Xin Guo1, Zhao-Wen Wang, Yi-Min Zhang
1School of Mechanical Engineering and Automation, Northeastern University, Shenyang, China.
Abstract:
The aim of this study is to investigate the effect of material property changes in the spinal components on the resonant frequency characteristics of the human spine. Several investigations have reported the material property sensitivity of human spine under static loading conditions, but less research has been devoted to the material property sensitivity of spinal biomechanical characteristics under a vibration environment. A detailed three-dimensional finite element model of the human spine, T12-pelvis, was built and used to predict the influence of material property variation on the resonant frequencies of the human spine. The simulation results reveal that material properties of spinal components have obvious influences on the dynamic characteristics of the spine. The annulus ground substance is the dominant component affecting the vertical resonant frequencies of the spine. The percentage change of the resonant frequency relative to the basic condition was more than 20% if Young's modulus of disc annulus is less than 1.5 MPa. The vertical resonant frequency may also decrease if Poisson's ratio of nucleus pulposus of intervertebral disc decreases.
Related Concept Videos
Bending of Members Made of Several Materials
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
Resonance and Hybrid Structures
Resonance Structures and Resonance Hybrids
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.
Resonance in an AC Circuit
Sound Waves: Resonance
Frequency of Spring-Mass System
Consider a block on a spring on a frictionless surface. There...