Inter-digit co-ordination and object-digit interaction when holding an object with five digits
Inter-digit co-ordination and object-digit interaction when holding an object with five digits
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DOI：
10.1080/00140130210129673
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发表时间：
2002-05-01
期刊：
影响因子：
2.4
通讯作者：
Li, ZM
中科院分区：
文献类型：
--
作者：
Li, ZM
本研究采用五、六分量力/力矩传感器，考察了在持续物体保持任务中手指间的协调和物体-手指的交互作用。单个手指法向力和拇指法向力的总和显示出平行变化，平均中位数相关系数为0.941。与其他力/扭矩迹线相比，法向力迹线显示出最低的变异系数（约9%，按数字平均）。食指、中指、无名指和小指法向力的方差之和约为四指法向力方差之和的50%。拇指、食指、中指、无名指和小指分别占总法向力的50.0%、15.4%、14.6%、11.7%和7.3%，占总垂直剪切力（即载荷）的39.4%、9.9%、19.3%、14.0%和17.5%。拇指、食指、中指、无名指和小指的法向力与合成剪切力的比值分别为2.6、4.5、1.8、2.2和1.3。在物体握持过程中，单个手指在物体-手指表面的压力迁移区域的中心范围为0.30至1.21 mm（2）。本研究揭示了一些具体的物-数机制和多数协调原则。这项研究的结果可能有助于改善人体工程学设计，涉及使用多个数字。
The current study investigated inter-digit co-ordination and object-digit interaction during sustained object holding tasks by using five, six-component force/torque sensors. The sum of the individual finger normal forces and the thumb normal force showed a parallel variation with a mean median correlation coefficient of 0.941. The normal force traces demonstrated the lowest coefficient of variation (about 9% as averaged across digits) as compared with other force/torque traces. The sum for the variances of the normal forces of the index, middle, ring, and little fingers was about 50% of the variance of the summed normal force of the four fingers. Of the five digits, the thumb, index, middle, ring and little fingers accounted for 50.0, 15.4, 14.6, 11.7 and 7.3% of the total normal force; and 39.4, 9.9, 19.3, 14.0 and 17.5% of the total vertical shear force (i.e. the load), respectively. The ratios of the normal force to the resultant shear force were 2.6, 4.5, 1.8, 2.2 and 1.3 for the thumb, index, middle, ring and little finger, respectively. The centre of pressure migration area of a single digit at the object-digit surface during object holding ranged from 0.30 to 1.21 mm(2). The current study reveals a number of detailed object-digit mechanics and multiple digits coordination principle. The results of this study may help to improve ergonomic designs that involve the usage of multiple digits.