Department of Biomedical Engineering, University of Alberta, 1098 Research Transition Facility, Edmonton, Alberta T6G 2V2, Canada.
Faculty of Kinesiology, Sport, and Recreation, University of Alberta, 3-100 University Hall, Van Vliet Complex, Edmonton, Alberta T6G 2H9, Canada.
Gait Posture. 2019 Mar;69:176-186. doi: 10.1016/j.gaitpost.2019.01.037. Epub 2019 Jan 28.
Optical motion capture is a powerful tool for assessing upper body kinematics, including compensatory movements, in different populations. However, the lack of a standardized protocol with clear functional relevance hinders its clinical acceptance.
The objective of this study was to use motion capture to: (1) characterize angular joint kinematics in a normative population performing two complex, yet standardized upper limb tasks with clear functional relevance; and (2) assess the protocol's intra-rater reliability.
Twenty non-disabled adults performed the previously developed Pasta Box Task and Cup Transfer Task. The kinematics of the upper body were captured using an optoelectronic motion capture system and rigid plates with reflective markers. Angular joint trajectories, peak angle, range of motion (RoM), and peak angular velocity were extracted for the trunk, shoulder, elbow, forearm, and wrist. Intra-class correlation was used to assess the intra-rater reliability of the kinematic measures.
Both tasks required minimal trunk motion. Cross-body movements required greater RoM at the trunk, shoulder, and elbow joints compared to movements in front of the body. Reaches to objects further away from the body required greater trunk and elbow joint RoM compared to reaches to objects closer to the body. Transporting the box of pasta required the wrist to maintain an extended position. The two different grasp patterns in the Cup Transfer Task forced the wrist into a flexed and ulnar-deviated position for the near cup, and an extended and radial-deviated position for the far cup. For both tasks, the majority of measures displayed intra-class correlation values above 0.75, indicating good reliability.
Our protocol and functional tasks elicit a degree of movement sensitivity that is not available in current clinical assessments. Our study also provides a comprehensive dataset that can serve as a normative benchmark for quantifying movement compensations following impairment.
光学运动捕捉是评估包括代偿运动在内的上半身运动学的强大工具，适用于不同人群。然而，由于缺乏具有明确功能相关性的标准化方案，其临床应用受到限制。
本研究旨在使用运动捕捉技术：(1) 对具有明确功能相关性的两个复杂但标准化的上肢任务中正常人群的关节角度运动学进行特征描述；(2) 评估该方案的内部测试者可靠性。
20 名非残疾成年人完成了先前开发的意面盒任务和杯子转移任务。使用光电运动捕捉系统和带有反光标记的刚性板来捕捉上半身的运动学。提取躯干、肩部、肘部、前臂和手腕的关节角度轨迹、峰值角度、运动范围（ROM）和峰值角速度。采用组内相关系数评估运动学测量的内部测试者可靠性。
两个任务都需要最小的躯干运动。与身前运动相比，交叉运动需要更大的躯干、肩部和肘部关节 ROM。与靠近身体的物体相比，到达身体较远的物体需要更大的躯干和肘部关节 ROM。搬运意面盒需要保持手腕伸展位置。杯子转移任务中的两种不同抓握模式迫使手腕在靠近杯子时处于弯曲和尺偏位置，在拿远处杯子时处于伸展和桡偏位置。对于这两个任务，大多数测量值的组内相关系数均大于 0.75，表明可靠性良好。
我们的方案和功能性任务引出了一种在当前临床评估中无法获得的运动敏感性。我们的研究还提供了一个全面的数据集，可以作为量化损伤后运动代偿的规范基准。
