Novel Platform for Quantitative Assessment of Functional Object Interactions After Stroke.
Novel Platform for Quantitative Assessment of Functional Object Interactions After Stroke.
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DOI：
10.1109/tnsre.2022.3226067
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发表时间：
2023
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许多中风患者表现出上肢运动障碍。这些损伤通常导致功能障碍，并影响日常生活活动的表现，其中成功操纵物体至关重要。因此，了解上肢运动缺陷如何表现在与物体的功能性相互作用中对于康复至关重要。然而，量化这些任务中的技能一直是一个挑战。传统的康复评估需要训练有素的临床医生，耗时，并产生主观评分。本文介绍了一个定制设计的设备，“魔术表”，可以记录实时运动的中风患者在与物体，具体地说，一杯咖啡”。该任务及其定量评估来自以前的基础科学研究。中风后的六名参与者和六名身体健全的参与者移动了一个3D打印的杯子，里面有一个滚动的球，代表晃动的咖啡，有3个难度级别。通过桌子上方的高分辨率摄像头捕捉动作。传统的运动学指标（运动时间和平滑度）和新的运动学指标accountingfor对象的相互作用（风险和可预测性）评估性能。不出所料，无论是在简单的伸手还是在杯球系统的运输过程中，中风患者的移动速度都比身体健全的参与者更慢、更不平稳。然而，更敏感的是互信息，它捕获了相互作用的可预测性，如先前的理论研究所示，这在杯子运输中至关重要。可预测性敏感地测量随着难度水平的增加表现的差异。它还显示了最好的组内一致性，有希望的不同程度的损害之间的敏感区分。这项研究强调了这种新设备的可行性，并表明，检查动态对象的相互作用可能会提供有价值的见解中风后上肢功能的评估和康复有用。
Many persons with stroke exhibit upper extremity motor impairments. These impairments often lead to dysfunction and affect performance in activities of daily living, where successful manipulation of objects is essential. Hence, understanding how upper extremity motor deficits manifest in functional interactions with objects is critical for rehabilitation. However, quantifying skill in these tasks has been a challenge. Traditional rehabilitation assessments require highly trained clinicians, are time-consuming, and yield subjective scores. This paper introduces a custom-designed device, the “MAGIC Table”, that can record real-time kinematics of persons with stroke during interaction with objects, specificallya ‘cup of coffee’. The task and its quantitative assessments were derived from previous basic-science studies. Six participants after stroke and six able-bodied participants moved a 3D-printed cup with a rolling ball inside, representing sloshing coffee, with 3 levels of difficulty. Movements were captured via a high-resolution camera above the table. Conventional kinematic metrics (movement time and smoothness) and novel kinematic metrics accountingfor object interaction(risk and predictability) evaluated performance. Expectedly, persons with stroke moved more slowly and less smoothly than able-bodied participants, in both simple reaches and during transport of the cup-and-ball system. However, the more sensitivemetric was mutual information, which captured the predictability of interactions, essential in cup transport as shown in previous theoretical research. Predictabilitysensitively measured differences in performance with increasing levels of difficulty. It also showed the best intraclass consistency, promising sensitive differentiation between different levels of impairment. This study highlights the feasibility of this new device and indicates that examining dynamic object interaction may provide valuable insights into upper extremity function after stroke useful for assessment and rehabilitation.