Multimodal Integration Research Group, Institute for Human Science and Biological Engineering, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan.
Ergonomics. 2010 Apr;53(4):491-501. doi: 10.1080/00140130903556336.
To quantify an individual's ability to perform manual operations stably, the relationship between hand stability and the 10-Hz physiological tremor was investigated. A total of 35 subjects were assessed when performing force and position control tasks, which were representative of ordinary hand movements. Hand stability was analysed as two components: the fluctuation caused by voluntary control (the control error or inaccuracy when voluntarily maintaining a position or force) and the involuntary oscillatory fluctuation (physiological tremor). The control error was defined by the standard deviation of the low frequency component. The tremor was evaluated based on the power spectrum around 10 Hz. A positive correlation between the control error and the 10-Hz tremor was observed in the finger force control tasks. A correlation between finger tremor and arm tremor also was observed; subjects showing small tremors in the finger tasks also exhibited small tremors when performing the arm tasks. Taken together, the results suggested that the 10-Hz tremor can be used as a benchmark to evaluate an individual's ability to use their hands precisely. STATEMENT OF RELEVANCE: It is important to be able to quantify an individual's ability to perform precise manual operations, such as those required for microsurgery. One important aspect is instability when applying force with a finger. The relationship between hand stability and the 10-Hz physiological tremor was investigated in this study. A correlation was found between control error (or inaccuracy when voluntarily maintaining a position or force) and the 10-Hz tremor in the finger force control tasks and the results suggest that the 10-Hz tremor can be used as a measure to evaluate an individual's ability to use their hands precisely.
为了量化个体稳定执行手动操作的能力，研究了手的稳定性与 10Hz 生理震颤之间的关系。在执行力和位置控制任务时，对总共 35 名受试者进行了评估，这些任务代表了普通的手部运动。手的稳定性分析为两个分量：由自愿控制引起的波动（自愿保持位置或力时的控制误差或不准确性）和非自愿振荡波动（生理震颤）。控制误差由低频分量的标准差定义。根据约 10Hz 的功率谱评估震颤。在手指力控制任务中，观察到控制误差与 10Hz 震颤之间存在正相关。还观察到手指震颤与手臂震颤之间存在相关性；在手指任务中表现出小震颤的受试者在执行手臂任务时也表现出小震颤。总之，结果表明 10Hz 震颤可以用作评估个体精确使用双手能力的基准。
能够量化个体执行精确手动操作的能力非常重要，例如微创手术所需的操作。一个重要方面是用手指施加力时的不稳定性。在这项研究中，研究了手的稳定性与 10Hz 生理震颤之间的关系。在手指力控制任务中，观察到控制误差（或自愿保持位置或力时的不准确性）与 10Hz 震颤之间存在相关性，结果表明 10Hz 震颤可用作评估个体精确使用双手能力的指标。
