利用虚拟膝关节对准装置和插入式步态模型研究膝关节外侧标记物系统位移对步态运动学的影响

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture Pub Date : 2025-05-01 DOI:10.1016/j.gaitpost.2025.04.035

Lisa Schneemann , Dagmar Linnhoff , Bettina Wollesen , Klaus Mattes , Inke Marie Albertsen

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引用次数: 0

摘要

基于背景标记的运动捕捉广泛应用于临床步态分析，但由于不正确的标记放置错误会影响运动学结果。当使用插入式步态模型（PiG, Vicon, Oxford， UK）时，虚拟膝关节对齐装置（vKAD, Prophysics, Kloten, Switzerland）被设计用于自动纠正外侧小腿和股骨上的标记移位。然而，使用vKAD的膝关节外侧标记物位移对步态运动学的影响尚未得到研究。研究问题：在使用PiG和vKAD时，系统的外侧膝关节标记物移位对摆动阶段膝关节（矢状、额状、横向）和髋关节（横向）的最大角度有显著影响吗？方法12名健康成人（27.9 ± 7岁，173.1 ± 9 cm, 68.9 ± 7 kg）在5种膝关节外侧标记物放置条件下，采用PiG和vKAD进行步态分析。条件包括正确的解剖位置（参考）和系统移位1 cm和2 cm的前后参考。双向重复方差分析比较了两种情况下摆动阶段膝关节（矢状、额状、横向）和髋关节（横向）的最大关节角度。结果所有选择的关节角度均受标记物放置条件的显著影响。2 cm到参考位置的位移导致以下运动学偏差：髋关节内旋7°/-11°，膝关节屈曲2°/-4°，膝关节内翻7°/-8°，膝关节内旋1°/-4°。意义：即使是1 cm的外侧膝关节前移位也会导致摆动阶段非生理性的膝关节内翻活动范围，过高估计髋关节内旋。这些发现对研究人员和临床医生具有实际意义，因为它们可以用于优化膝关节轴和提高仪器步态分析的准确性。提高准确性，尤其是髋部旋转的准确性，对于治疗脑瘫等患者的临床医生来说至关重要。

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The impact of systematic displacement of the lateral knee marker on gait kinematics using the virtual knee alignment device and the Plug-in Gait model

Background

Marker-based motion capture is widely used in clinical gait analysis, but errors due to incorrect marker placement can impact kinematic results. When using the Plug-in Gait model (PiG, Vicon, Oxford, UK) the virtual Knee Alignment Device (vKAD, Prophysics, Kloten, Switzerland) is designed to automatically correct marker displacements on the lateral shank and femur. However, the impact of lateral knee marker displacement on gait kinematics using vKAD has not been studied.

Research question

Does systematic lateral knee marker displacement have a significant effect on the maximum angles of the knee (sagittal, frontal, transverse) and hip joint (transverse) during swing phase when using PiG and vKAD?

Methods

Twelve healthy adults (27.9 ± 7 years, 173.1 ± 9 cm, 68.9 ± 7 kg) underwent gait analysis using PiG and vKAD in five marker placement conditions of the lateral knee marker on both legs. Conditions included the correct anatomical position (reference) and systematic displacements of 1 cm and 2 cm anterior/posterior to the reference. A two-way repeated ANOVA compared maximum joint angles of the knee (sagittal, frontal, transverse) and hip (transverse) during the swing phase between conditions.

Results

All selected joint angles were significantly affected by the marker placement conditions. A 2 cm displacement to the reference position resulted in the following kinematic deviations: hip internal rotation 7°/-11°, knee flexion 2°/-4°, knee varus/adduction 7°/-8°, and knee internal rotation 1°/-4°.

Significance

Even a 1 cm anterior displacement of the lateral knee marker led to an unphysiological knee varus range of motion in the swing phase, overestimation hip internal rotation. These findings have practical implications for researchers and clinicians as they can serve to optimize the knee joint axis and enhancing accuracy of instrumental gait analysis. Improved accuracy, particularly in hip rotation, is crucial for clinicans working with patients like those with cerebral palsy.

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来源期刊

Gait & posture 医学-神经科学

CiteScore

4.70

自引率

12.50%

发文量

616

审稿时长

6 months

期刊介绍： Gait & Posture is a vehicle for the publication of up-to-date basic and clinical research on all aspects of locomotion and balance. The topics covered include: Techniques for the measurement of gait and posture, and the standardization of results presentation; Studies of normal and pathological gait; Treatment of gait and postural abnormalities; Biomechanical and theoretical approaches to gait and posture; Mathematical models of joint and muscle mechanics; Neurological and musculoskeletal function in gait and posture; The evolution of upright posture and bipedal locomotion; Adaptations of carrying loads, walking on uneven surfaces, climbing stairs etc; spinal biomechanics only if they are directly related to gait and/or posture and are of general interest to our readers; The effect of aging and development on gait and posture; Psychological and cultural aspects of gait; Patient education.