A model-based approach for estimation of changes in lumbar segmental kinematics associated with alterations in trunk muscle forces.
A model-based approach for estimation of changes in lumbar segmental kinematics associated with alterations in trunk muscle forces.
复制标题
一种基于模型的方法，用于估计与躯干肌肉力量变化相关的腰椎节段运动学变化。
DOI：
10.1016/j.jbiomech.2017.09.024
复制
发表时间：
2018
影响因子：
2.4
通讯作者：
Bazrgari,Babak
中科院分区：
文献类型：
--
作者：
Shojaei,Iman;Arjmand,Navid;Meakin,JudithR;Bazrgari,Babak
来自成像的几何信息，如果与基于优化的神经肌肉评估方法相结合，可以为躯干神经肌肉行为的个性化评估提供独特的平台。然而，这种方法是可行的，只有当腰椎运动学的差异，由于躯干神经肌肉行为的差异，可以捕捉到目前的成像技术。在优化过程中的脊柱有限元模型被用来估计与五个不同的假设躯干神经肌肉策略（TNS）的腰椎节段运动学。每个TNS优化了下背部生物力学的一个方面，并被假定为代表无症状的人或神经肌肉异常的TNS。对于每个TNS，腰椎节段运动学估计为一个单一的静态躯干屈曲姿势，分别涉及40°和10°的胸部和骨盆旋转。TNS改变的运动节段的角度和平移变形的最小变化范围分别为0°至0.5°和0 mm至0.04 mm。神经肌肉策略改变的运动节段的角度和平移变形的最大变化范围分别为2.4°至7.5°和0.11 mm至0.39 mm。在97%的角度变形病例和55%的平移变形病例中，两种TNS组合的腰椎节段运动学差异在当前成像技术报告的准确性范围内。结合成像和计算建模似乎有潜力预测神经肌肉策略的改变。
The geometrical information from imaging, if combined with optimization-based methods of neuromuscular assessment, may provide a unique platform for personalized assessment of trunk neuromuscular behavior. Such a method, however, is feasible only if differences in lumbar spine kinematics due to differences in trunk neuromuscular behavior can be captured by the current imaging techniques. A finite element model of the spine within an optimization procedure was used to estimate segmental kinematics of lumbar spine associated with five different hypothetical trunk neuromuscular strategies (TNSs). Each TNS optimized one aspect of lower back biomechanics and was assumed to either represent the TNS of asymptomatic persons or a neuromuscular abnormality. For each TNS, the segmental kinematics of lumbar spine was estimated for a single static trunk flexed posture involving, respectively, 40° and 10° of thoracic and pelvic rotations. Minimum changes in the angular and translational deformations of a motion segment with alterations in TNS ranged from 0° to 0.5° and 0 mm to 0.04 mm, respectively. Maximum changes in the angular and translational deformations of a motion segment with alterations in neuromuscular strategy ranged from 2.4° to 7.5° and 0.11 mm to 0.39 mm, respectively. The differences in kinematics of lumbar segments between each combination of two TNSs in 97% of cases for angular deformation and 55% of cases for translational deformation were within the reported accuracy of current imaging techniques. Combined imaging and computational modeling appears to have potentials for predicting alterations in neuromuscular strategies.