Precision Mechanical Process and Control R&D Group, Dongnam Division, Korea Institute of Industrial Technology, Jinju, Republic of Korea.
Department of Rehabilitation Medicine, College of Medicine, Yeungnam University, Daegu, Republic of Korea.
Spine (Phila Pa 1976). 2021 Oct 1;46(19):E1015-E1021. doi: 10.1097/BRS.0000000000004014.
Analytical biomechanical study using a finite-element (FE) model.
We investigated the effects of paraspinal muscle volume to the physiological loading on the lower lumbar vertebral column using a FE model.
The FE model analysis can measure the physiological load on the lumbar vertebral column. Which changes as the surrounding environment changes. In this study, our FE model consisted of the sacrum, lumbar spine (L3-L5), intervertebral discs, facet joints, and paraspinal muscles.
Three-dimensional FE models of healthy lumbar spinal units were reconstructed. The physiological loads exerted on the lumbar vertebra column were evaluated by applying different paraspinal muscle volumes (without muscles, 50%, 80%, and 100% of healthy muscle volume).
As the paraspinal muscle volume increased, the loads exerted on the vertebral column decreased. The mean load on the intervertebral disc was 1.42 ± 0.75 MPa in the model without muscle, 1.393 ± 0.73 MPa in the 50% muscle volume model, 1.367 ± 0.71 MPa in the 80% muscle volume model, and 1.362 ± 0.71 MPa in the 100% muscle volume model. The mean loads exerted on the posterior column of lumbar spine were 11.79 ± 4.70 MPa in the model without muscles, 11.57 ± 4.57 MPa in the model with 50% muscle volume, and 11.13 ± 4.51 MPa in the model with 80% muscle volume, and 10.92 ± 4.33 MPa in the model with 100% muscle volume. The mean pressure on the vertebral body in the model without paraspinal muscle, and with 50%, 80%, and 100% paraspinal muscle volume were 14.02 ± 2.82, 13.82 ± 2.62, 13.65 ± 2.61, and 13.59 ± 2.51 MPa, respectively.
Using FEM, we observed that the paraspinal muscle volume decreases pressure exerted on the lumbar vertebral column. Based on these results, we believe that exercising to increase paraspinal muscle volume would be helpful for spinal pain management and preventing lumbar spine degeneration.Level of Evidence: N/A.
使用有限元（FE）模型进行分析生物力学研究。
我们使用 FE 模型研究了竖脊肌体积对下腰椎生理负荷的影响。
FE 模型分析可以测量腰椎的生理负荷。随着周围环境的变化而变化。在这项研究中，我们的 FE 模型由骶骨、腰椎（L3-L5）、椎间盘、关节突关节和竖脊肌组成。
重建了健康腰椎单位的三维 FE 模型。通过施加不同的竖脊肌体积（无肌肉、50%、80%和 100%健康肌肉体积）来评估施加在腰椎上的生理负荷。
随着竖脊肌体积的增加，作用于脊柱的负荷减小。无肌肉模型中椎间盘的平均负荷为 1.42±0.75 MPa，50%肌肉体积模型为 1.393±0.73 MPa，80%肌肉体积模型为 1.367±0.71 MPa，100%肌肉体积模型为 1.362±0.71 MPa。无肌肉模型中腰椎后柱的平均负荷为 11.79±4.70 MPa，50%肌肉体积模型为 11.57±4.57 MPa，80%肌肉体积模型为 11.13±4.51 MPa，100%肌肉体积模型为 10.92±4.33 MPa。无竖脊肌模型、50%、80%和 100%竖脊肌模型椎体上的平均压力分别为 14.02±2.82、13.82±2.62、13.65±2.61 和 13.59±2.51 MPa。
通过有限元法，我们观察到竖脊肌体积的减少会降低腰椎所受的压力。基于这些结果，我们认为进行锻炼以增加竖脊肌体积有助于治疗脊柱疼痛和预防腰椎退变。
N/A。
