HE Tianxiang,YANG Yu,XU Chengshuo,et al.Effect of force frequency in lumbar oscillation manipulation on therapeutic efficacy: a simulation study based on the spinal multi‑rigid‑body model[J].Shanghai Journal of Traditional Chinese Medicine,2025,59(8):49-53.
HE Tianxiang,YANG Yu,XU Chengshuo,et al.Effect of force frequency in lumbar oscillation manipulation on therapeutic efficacy: a simulation study based on the spinal multi‑rigid‑body model[J].Shanghai Journal of Traditional Chinese Medicine,2025,59(8):49-53. DOI: 10.16305/j.1007-1334.2025.z20250430008.
Effect of force frequency in lumbar oscillation manipulation on therapeutic efficacy: a simulation study based on the spinal multi‑rigid‑body model
By establishing a multi-rigid-body mechanical model and using simulation technology, this study aims to investigate the impact of applied force frequency in lumbar oscillation manipulation on segmental displacement in the lumbar spine, and to explore the response of intervertebral discs at different levels of degeneration, specifically at the L
4
-L
5
and L
5
-S
1
, to various force frequencies, providing a theoretical basis for optimizing oscillation manipulation in the intervention of low back pain.
Methods
2
A biomechanical model of the lumbar spine was established by treating vertebral bodies as rigid bodies and intervertebral discs, ligaments, and other soft tissues as springs and dampers. A six-degree-of-freedom mass-spring-damper system model was constructed. The simulation of intervertebral disc degeneration was performed by adjusting the elastic and damping coefficients. A simulation model was established using Matlab/Simulink software, with a sine wave variation as the input force to simulate the effect of different force frequencies on lumbar segmental displacement. The maximum relative displacement of the lumbar segments was recorded under conditions of non-degenerated intervertebral discs and varying levels of degeneration at L
4
-L
5
and L
5
-S
1
, with force frequency changes.
Results
2
In the case of non-degenerated intervertebral discs, the maximum relative displacement of lumbar segments significantly increased within a frequency range of 2.5-10 Hz as the frequency decreased, while it gradually decreased within the 1-2.5 Hz range. When the intervertebral discs at L
4
-L
5
and L
5
-S
1
degenerated, a force frequency of 2.5 Hz caused the maximum displacement response. As the degree of disc degeneration increased, the maximum relative
displacement of lumbar segments gradually decreased.
Conclusion
2
Within a certain frequency range, lower force frequencies lead to greater lumbar displacement, with the best therapeutic effect achieved at around 2.5 Hz.
关键词
Keywords
references
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