Postural variation of hand precision grips by object size
Postural variation of hand precision grips by object size
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DOI：
10.1007/s12206-014-0309-x
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发表时间：
2014-05
影响因子：
1.6
通讯作者：
Jongwoo Park;N. J. Seo;J. Son;W. Kim;J. Cheong
中科院分区：
文献类型：
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作者：
Jongwoo Park;N. J. Seo;J. Son;W. Kim;J. Cheong
我们的双重目的是（i）定量识别特征向量，即手指关节角度的特定组合，其在配置空间（手中手指关节变量的空间）中主导精确握持的姿势变化，以及（ii）使用特征向量的参数研究姿势变化与物体大小之间的线性相关性。涉及 14 名参与者的实验测量了参与者的抓握姿势，这些参与者被要求使用六种指定的精确抓握（球形、三脚架、捏、四捏、三捏和迷你捏）抓握八个不同直径的圆柱形物体。回归分析表明，在每次精确握持中，随着物体尺寸相对于手部尺寸的增加，姿势在配置空间中以独特的线性方向逐渐变化。建立了精确握把的定量模型，可用于重现不同手尺寸的成年人抓握不同尺寸物体的精确握持姿势。
Our two-fold purpose was (i) to quantitatively identify characteristic vectors, i.e., specific combinations of joint angles of fingers, that dominate the posture variation of precision grips in the configuration space (the space with joint variables of the fingers in the hand), and (ii) to investigate linear correlations between the postural variation and the object size using the parameters of the characteristic vectors. Experiments involving 14 participants measured the grip postures of the participants who were asked to grasp eight cylindrical objects of different diameters using six designated precision grips (spherical, tripod, pinch, quad-pinch, tri-pinch, and mini-pinch). Regression analysis showed that within each precision grip, the postures changed gradually in a unique linear direction in the configuration space with an increasing object size relative to the hand size. Quantitative models of the precision grips were established that could be used to reproduce the precision grip postures for grasping various object sizes by adults of various hand sizes.