Effect of simulated changes in pelvic tilt on hip joint forces.
Effect of simulated changes in pelvic tilt on hip joint forces.
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DOI：
10.1016/j.jbiomech.2022.111048
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发表时间：
2022-04
影响因子：
2.4
通讯作者：
Lewis, Cara L.
中科院分区：
文献类型：
--
作者：
Ismail, Karim K.;Lewis, Cara L.
肌肉骨骼建模通常用于模拟和比较个体之间的各种运动。对于股骨髋臼撞击综合征（FAIS）等疾病，个体行走时骨盆前倾比无FAIS的患者更明显。然而，目前尚不清楚在肌肉骨骼建模中考虑骨盆倾斜是否会导致肌肉力的变化，进而导致关节力的变化。采用Vicon和Visual3D对6名个体的步态数据进行采集和处理。每个参与者的骨盆倾斜度在步态期间的所有时间点调整±10°。每个个体进行三次分析：未调整倾斜，一次后倾（正）倾斜和一次前倾（负）倾斜。将得到的数据导入OpenSim，以确定骨盆和股骨参考架中的肌肉力和股骨对髋臼（髋关节）力。每个参与者的数据在MATLAB中针对步态周期和体重进行标准化，并使用统计参数映射来确定关节和肌肉力的差异是否在不同的骨盆方向上显着。从骨盆后倾到骨盆前倾的变化减少了合力。在骨盆参考系中，前向关节力减少，而内侧力增加。在股骨参照系中，前向和内侧关节力增加，而上向力减少。前臀中肌和髂肌肌力下降，而股方肌、梨状肌和双子肌肌力增加。鉴于这些结果，未来的研究使用肌肉骨骼模型应考虑骨盆倾斜肌肉骨骼模型，以获得更现实的健康和病理条件之间的比较。
Musculoskeletal modeling is commonly used to simulate and compare various movements between individuals. For conditions such as femoroacetabular impingement syndrome (FAIS), individuals tend to walk with more anterior pelvic tilt than those without FAIS. However, it is unknown whether accounting for pelvic tilt in musculoskeletal modeling would lead to a change in muscle forces and in turn, joint forces. Gait data of six individuals were collected and processed using Vicon and Visual3D. Each participant’s pelvic tilt was adjusted by ±10° at all time points during gait. Three analyses were performed per individual: no adjustment in tilt, one posterior (positive) tilt, and one anterior (negative) tilt. The resulting data were imported into OpenSim to determine muscle forces and the resulting femur-on-acetabulum (hip joint) forces in the pelvic and femoral reference frames. Data for each participant were normalized for gait cycle and body weight in MATLAB, and statistical parametric mapping was used to determine if the differences in joint and muscle forces were significant across different pelvic orientations. Shifting from posterior to anterior pelvic tilt reduced resultant forces. In the pelvic reference frame, anteriorly-directed joint forces decreased, while medially-directed forces increased. In the femoral reference frame, anteriorly- and medially-directed joint forces increased, while superiorly-directed forces decreased. Anterior gluteus medius and iliacus muscle forces decreased, while quadratus femoris, piriformis, and gemellus muscle forces increased. Given these results, future studies using musculoskeletal modeling should account for pelvic tilt in musculoskeletal models to obtain more realistic comparisons between healthy and pathological conditions.
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