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首页> 外文期刊>Journal of Biomechanics >Coordination of thumb joints during opposition.
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Coordination of thumb joints during opposition.

机译：反对派期间拇指关节的协调。

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Thumb opposition plays a vital role in hand function. Kinematically, thumb opposition results from composite movements from multiple joints moving in multiple directions. The purpose of this study was to examine the coordination of thumb joints during opposition tasks. A total of 15 female subjects with asymptomatic hands were studied. Three-dimensional angular kinematics of the carpometacarpal (CMC), metacarpophalangeal (MCP) and interphalangeal (IP) joints were obtained by a marker-based motion analysis system. Thumb opposition revealed coordination among joints in a specific direction (inter-joint coordination) and among different directions within a joint (intra-joint coordination). In particular, linear couplings existed between the flexion and pronation at the CMC joint, and between the flexion of the CMC joint and flexion of the MCP joint. Principal component analysis showed that only two principal components adequately represented the thumb opposition data of seven movement directions. A term functional degrees of freedom by virtue of principal component analysis was proposed to uncover the extent of movement coordination in functional tasks.
机译：拇指对立在手功能中起着至关重要的作用。运动学上，拇指的对立来自多个关节在多个方向上的运动。这项研究的目的是检查反对派任务期间拇指关节的协调性。共研究了15名无症状女性受试者。通过基于标记的运动分析系统获得了腕掌关节，指掌关节和指间关节的三维角运动学。拇指对位显示关节之间在特定方向上的协调（关节间协调）和关节内不同方向之间的协调（关节内协调）。尤其是，在CMC关节的屈曲和旋前之间以及CMC关节的屈曲和MCP关节的屈曲之间存在线性耦合。主成分分析表明，只有两个主成分可以充分代表七个运动方向的拇指相对数据。通过主成分分析提出了功能自由度一词，以揭示功能任务中运动协调的程度。

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