Assessing upper extremity motor function in practice of virtual activities of daily living.
Assessing upper extremity motor function in practice of virtual activities of daily living.
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DOI：
10.1109/tnsre.2014.2360149
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发表时间：
2015-03
期刊：
影响因子：
--
通讯作者：
Diamond PT
中科院分区：
文献类型：
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作者：
Adams RJ;Lichter MD;Krepkovich ET;Ellington A;White M;Diamond PT
本研究旨在探讨虚拟日常生活活动（ADLs）练习中获得的上肢运动功能测量的标准效度。14名偏瘫中风患者采用了虚拟职业治疗助手（VOTA），该助手由高保真虚拟世界和Kinect™传感器组成，分为四次，持续时间约为一小时。基于Unscented卡尔曼滤波的人体运动跟踪算法在虚拟ADL活动执行过程中实时估计UE关节运动学，从而实现用户化身的动画和与运动速度和平滑度相关的自动生成指标。这些指标在虚拟adl的表现过程中聚合在离散的子任务元素上，并与UE运动表现的既定评估——Wolf运动功能测试（WMFT）的分数进行比较。Spearman的等级相关分析表明，VOTA衍生指标与基于时间的WMFT评估之间存在适度的相关性，这支持了VOTA测量作为UE康复计划（包括虚拟adl实践）期间跟踪患者进展的标准有效性。
A study was conducted to investigate the criterion validity of measures of upper extremity (UE) motor function derived during practice of virtual activities of daily living (ADLs). Fourteen hemiparetic stroke patients employed a Virtual Occupational Therapy Assistant (VOTA), consisting of a high-fidelity virtual world and a Kinect™ sensor, in four sessions of approximately one hour in duration. An Unscented Kalman Filter-based human motion tracking algorithm estimated UE joint kinematics in real-time during performance of virtual ADL activities, enabling both animation of the user’s avatar and automated generation of metrics related to speed and smoothness of motion. These metrics, aggregated over discrete sub-task elements during performance of virtual ADLs, were compared to scores from an established assessment of UE motor performance, the Wolf Motor Function Test (WMFT). Spearman’s rank correlation analysis indicates a moderate correlation between VOTA-derived metrics and the time-based WMFT assessments, supporting the criterion validity of VOTA measures as a means of tracking patient progress during an UE rehabilitation program that includes practice of virtual ADLs.