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首页> 外文期刊>Journal of Biomechanics >A comparison of acromion marker cluster calibration methods for estimating scapular kinematics during upper extremity ergometry
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A comparison of acromion marker cluster calibration methods for estimating scapular kinematics during upper extremity ergometry

机译：上肢测功期间肩cro运动估计的肩峰标记簇校正方法的比较

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Accurate measurement of joint kinematics is required to understand the musculoskeletal effects of a therapeutic intervention such as upper extremity (UE) ergometry. Traditional surface-based motion capture is effective for quantifying humerothoracic motion, but scapular kinematics are challenging to obtain. Methods for estimating scapular kinematics include the widely-reported acromion marker cluster (AMC) which utilizes a static calibration between the scapula and the AMC to estimate the orientation of the scapula during motion. Previous literature demonstrates that including additional calibration positions throughout the motion improves AMC accuracy for single plane motions; however this approach has not been assessed for the non-planar shoulder complex motion occurring during UE ergometry. The purpose of this study was to evaluate the accuracy of single, dual, and multiple AMC calibration methods during UE ergometry. The orientations of the UE segments of 13 healthy subjects were recorded with motion capture. Scapular landmarks were palpated at eight evenly-spaced static positions around the 360 degrees cycle. The single AMC method utilized one static calibration position to estimate scapular kinematics for the entire cycle, while the dual and multiple AMC methods used two and four static calibration positions, respectively. Scapulothoracic angles estimated by the three AMC methods were compared with scapulothoracic angles determined by palpation. The multiple AMC method produced the smallest RMS errors and was not significantly different from palpation about any axis. We recommend the multiple AMC method as a practical and accurate way to estimate scapular kinematics during UE ergometry. (C) 2016 Elsevier Ltd. All rights reserved.
机译：需要准确测量关节运动学知识，以了解治疗干预措施（例如上肢（UE）测功）的肌肉骨骼作用。传统的基于表面的运动捕获对于量化肱胸腔运动是有效的，但是肩k运动学很难获得。估算肩cap运动的方法包括广泛报道的肩峰标记簇（AMC），该簇利用肩the骨和AMC之间的静态校准来估计肩motion骨在运动过程中的方向。先前的文献表明，在整个运动过程中包括额外的校准位置可以提高单平面运动的AMC精度。但是，尚未针对UE测功期间发生的非平面肩部复杂运动对该方法进行评估。这项研究的目的是评估UE测功期间单，双和多种AMC校准方法的准确性。通过运动捕获来记录13位健康受试者的UE段的方向。在360度周期内，在八个均匀间隔的静态位置触诊肩cap标志。单个AMC方法利用一个静态校准位置来估计整个周期的肩cap运动，而双AMC方法和多个AMC方法分别使用两个和四个静态校准位置。将通过三种AMC方法估算的肩or角与通过触诊确定的肩or角进行了比较。多重AMC方法产生的RMS误差最小，与围绕任何轴的触诊没有显着差异。我们建议将多种AMC方法作为一种实用且准确的方法来估算UE人体测量学期间的肩k运动。 （C）2016 Elsevier Ltd.保留所有权利。

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