Effect of finger posture on the tendon force distribution within the finger extensor mechanism.
Effect of finger posture on the tendon force distribution within the finger extensor mechanism.
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DOI：
10.1115/1.2978983
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发表时间：
2008-10
期刊：
影响因子：
--
通讯作者：
Kamper DG
中科院分区：
文献类型：
--
作者：
Lee SW;Chen H;Towles JD;Kamper DG
了解肌腱力转化为关节力矩将大大有助于调查手指运动中多块肌肉的复杂时空协调。在这项研究中，手指姿势的手指伸肌装置内的肌腱力传递的影响进行了研究。在5具尸体标本中，对食指的两个外源性伸肌腱（指总伸肌和食指固有伸肌）依次施加恒定的力。对这种负载的响应，即指尖力/力矩和伸肌装置的区域应变，进行了测量和分析，以估计肌腱力传递到伸肌帽的终端和中央滑动。重复测量方差分析显示，传递到每个肌腱滑移的肌腱力的量受手指姿势的显著影响，特别是受指间关节（IP）角度的影响（p < 0.01）。肌腱力传递到每个肌腱滑动被发现减少与IP屈曲。掌指关节角度的主要影响不像IP角度那样一致，但存在强烈的相互作用效应，当IP关节伸展时，MCP屈曲导致滑动力大幅降低（> 30%）。末端滑移力：中心滑移力的比率在各种姿势中保持相对恒定，约为1.7：1。力耗散到周围的结构被认为是主要负责所观察到的力姿态关系。由于姿势在力传递到肌腱滑动中的重要性，在研究手指运动控制或检查伸肌装置中的损伤机制时，应仔细考虑手指姿势的影响。
Understanding the transformation of tendon forces into joint torques would greatly aid in the investigation of the complex temporal and spatial coordination of multiple muscles in finger movements. In this study, the effects of the finger posture on the tendon force transmission within the finger extensor apparatus were investigated. In five cadaver specimens, a constant force was applied sequentially to the two extrinsic extensor tendons in the index finger, extensor digitorum communis and extensor indicis proprius. The responses to this loading, i.e. fingertip force/moment and regional strains of the extensor apparatus, were measured and analyzed to estimate the tendon force transmission into the terminal and central slips of the extensor hood. Repeated measures analysis of variance revealed that the amount of tendon force transmitted to each tendon slip was significantly affected by finger posture, specifically by the interphalangeal (IP) joint angles (p < 0.01). Tendon force transmitted to each of the tendon slips was found to decrease with the IP flexion. The main effect of the metacarpophalangeal joint angle was not as consistent as the IP angle, but there was a strong interaction effect for which MCP flexion led to large decreases in the slip forces (> 30%) when the IP joints were extended. The ratio of terminal slip force: central slip force remained relatively constant across postures at approximately 1.7:1. Force dissipation into surrounding structures was found to be largely responsible for the observed force-posture relationship. Due to the significance of posture in the force transmission to the tendon slips, the impact of finger posture should be carefully considered when studying finger motor control or examining injury mechanisms in the extensor apparatus.
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影响因子：
2.8
作者：
AN, KN;CHAO, EY;LINSCHEID, RL
通讯作者：
LINSCHEID, RL
影响因子：
1.9
作者：
Jan, SV;Rooze, M;Vico, L
通讯作者：
Vico, L
影响因子：
1.8
作者：
Kamper, DG;Fischer, HC;Cruz, EG
通讯作者：
Cruz, EG
DOI：
10.2106/00004623-196446080-00005
发表时间：
1964-01-01
影响因子：
5.3
作者：
LONG, C;BROWN, ME
通讯作者：
BROWN, ME
影响因子：
2.4
作者：
AN, KN;CHAO, EY;LINSCHEID, RL
通讯作者：
LINSCHEID, RL