FORCES IN GASTROCNEMIUS, SOLEUS, AND PLANTARIS TENDONS OF THE FREELY MOVING CAT
FORCES IN GASTROCNEMIUS, SOLEUS, AND PLANTARIS TENDONS OF THE FREELY MOVING CAT
复制标题
DOI：
10.1016/0021-9290(93)90056-k
复制
发表时间：
1993-08-01
影响因子：
2.4
通讯作者：
GUIMARAES, ACS
中科院分区：
文献类型：
--
作者：
HERZOG, W;LEONARD, TR;GUIMARAES, ACS
本研究的目的是深入了解功能组中肌肉之间的力分担机制。肌腱力测量同时获得腓肠肌，比目鱼肌，跖肌的10只猫在各种不同的运动任务，使用应变计为基础的力传感器。特别是，肌腱的力量进行了测量的条件下，运动速度被系统地改变，并在运动速度保持不变，但外部阻力步行系统变化。结果表明，腓肠肌和跖肌肌腱中的力随着运动强度的增加而增加，而与速度或外部阻力改变的强度无关。与此相反，峰值比目鱼肌部队，平均而言，几乎保持不变的所有条件下，然而，在比目鱼肌部队的大幅调制观察到连续的步幅周期。这些结果表明，比目鱼肌的力量是不受限制的外围（收缩）条件，但中央机制，并进一步，这些中央机制取决于运动的速度和阻力。
The purpose of this study was to gain an insight into the mechanisms of force sharing among muscles in a functional group. Tendon force measurements were obtained simultaneously from gastrocnemius, soleus, and plantaris muscles of 10 cats during a variety of different locomotor tasks using strain gauge based force transducers. In particular, tendon forces were measured for conditions where movement speed was altered systematically, and where movement speed was kept constant but external resistance to walking was varied systematically. The results show that forces in the gastrocnemius and plantaris tendons increase with increasing intensities of movement, independent of intensity being altered by varying speed or external resistance. In contrast, peak soleus forces, on an average, remained nearly the same for all conditions; however, substantial modulations in soleus force were observed for consecutive stride cycles. These results suggest that soleus forces are not limited by peripheral (contractile) conditions but by central mechanisms and, further, that these central mechanisms depend on speed of movement and resistance to movement.