Traditional approaches to measurement in upper-limb therapy have gaps that electronic sensing and recording can help fill. We highlight shortcomings in current kinematic recording devices, and we introduce a wrist sensing device that performs multimodal sensing during single-axis rotation. Our goal is to characterize normative kinesthetic perception and real-world performance as a multimodal sensory "fingerprint" that can serve as a reference point for identifying deficit in persons affected by stroke, and then as a jumping point for later neuroscientific interrogation. We present an experiment involving psychophysical measurements of passive stimuli discrimination, matching adjustment acuity, and ADL performance in 11 neurologically-intact persons. We found that passive velocity sense and active position sense of healthy controls, measured by velocity discrimination and position matching respectively, correlated in rank with each other, but other score comparisons of acuity or task performance had no statistically significant correlations. We also found that participants differed in acuity between passive and active velocity sense, which supports current understanding about muscle spindle activation being modulated by conscious motor command. The potential for our null correlation results to reveal dissociable aspects of deficit is discussed, as well as implications for future neuroscientific study with more kinematic measures and larger datasets.

翻译：传统上肢康复测量方法存在不足，电子传感与记录技术可帮助填补这些空白。我们指出当前运动学记录设备的缺陷，并介绍一种在单轴旋转过程中实现多模态传感的手腕传感装置。我们的目标是将规范化的动觉感知与现实表现特征化为多模态感觉"指纹"，作为识别中风患者功能缺陷的参照基准，并为后续神经科学研究提供切入点。我们在11名神经功能健全者中开展了涉及被动刺激辨别、匹配调节敏锐度和日常生活活动表现的心理物理学测量实验。研究发现：通过速度辨别和位置匹配分别测量的健康对照组被动速度觉与主动位置觉在排序上存在相关性，但其他敏锐度指标或任务表现评分比较均未呈现统计学显著相关性。我们还发现参与者在被动与主动速度觉的敏锐度上存在个体差异，这支持了当前关于肌梭激活受意识运动指令调节的理论认识。本文讨论了零相关结果在揭示可分离性功能缺陷方面的潜力，以及对未来采用更多运动学测量和更大数据集的神经科学研究的意义。