Contribution of the extrinsic and intrinsic hand muscles to the moments in finger joints
Contribution of the extrinsic and intrinsic hand muscles to the moments in finger joints
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DOI：
10.1016/s0268-0033(99)00058-3
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发表时间：
2000-03-01
影响因子：
1.8
通讯作者：
Latash, ML
中科院分区：
文献类型：
--
作者：
Li, ZM;Zatsiorsky, VM;Latash, ML
Objective.目前的工作的目的是开发一种方法来估计由外部和内部的手肌肉产生的力，并估计这些肌肉的手指关节力矩的贡献。实验方法和生物力学模型的开发用于估计（a）在手指关节产生的力矩，和（B）的贡献的内在和外在的肌肉的时刻，（c）在个别finger.Background的外在和内在的肌肉的力量，因为外部屈肌的差分插入，它是可能的，以隔离其机械效果在手指joint.Methods。在实验过程中，力施加的位置沿沿着单个手指平行变化。施力点分别为远节指骨、远节指间关节、近节指间关节。当施力点从远端指骨向近端指间关节的近端方向变化时，给定关节处的力矩减小。肌肉的内力和外力取决于实验条件。当施力点远侧超过近侧指间关节时，外源性肌肉是平衡指关节力矩的主要贡献者。目前的工作提供了一个实验协议和生物力学模型，允许估计的贡献的内在和外在的肌肉林格关节力矩。
Objective. The purpose of this current work is to develop a method of estimating force produced by the extrinsic and intrinsic hand muscles, and to estimate the contribution of these muscles to the finger joint moments.Design. Experimental methods and a biomechanical model were developed for the estimation of (a) moments produced at finger joints, and (b) contribution of the intrinsic and extrinsic muscles to the moments, (c) forces of the extrinsic and intrinsic muscles within individual fingers.Background Because of the differential insertions of the extrinsic flexors, it is possible to isolate their mechanical effect at finger joints.Methods. During the experiment, the location of force application was varied in parallel along individual fingers. The points of force application were on the distal phalanx, at the distal interphalangeal joint, or at the proximal interphalangeal joint.Results. When the point of force application was varied in the proximal direction from the distal phalanx to the proximal interphalangeal joint the moment at a given joint decreased. The intrinsic and extrinsic muscle forces were dependent on the experimental conditions. The extrinsic muscles were the major contributors in counterbalancing finger joint moments when the point of force application was distal beyond the proximal interphalangeal joint.Conclusion. This current work provides both an experimental protocol and a biomechanical model that allows estimation of the contribution of the intrinsic and extrinsic muscles to ringer joint moments.