Architecture of the human gastrocnemius muscle and some functional consequences.
Architecture of the human gastrocnemius muscle and some functional consequences.
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DOI：
10.1159/000146047
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
P. Huijing
中科院分区：
文献类型：
--
作者：
P. Huijing
研究人员对八具人类尸体的腓肠肌进行了测量，以便在一定程度上详细描述该肌肉及其头部的结构。外侧头的纤维比内侧头的纤维含有更多的肌节。这种差异对用平面肌肉模型计算的肌肉长度-力曲线的影响，由于纤维角度相对于肌肉牵拉线的差异的影响而减弱。在头部内，所有肌肉的近端和远端纤维的肌节数量都有一定的变化。在侧头，远端纤维比近端纤维含有更少的肌节。在一些头部中也有这种情况，而另一些则相反。在侧头中，较长的纤维与腱板的附着角度较小，反之亦然，而在内侧头中，这种关系只是偶尔发现。在一个束的纤维中发现了一些肌节数量的变化。在较大的肌肉长度下，肌节数量的变化对长度-力曲线的影响可能不显著，但对肌肉长度相对较小的个体可能有一定的重要性。
Measurements were performed on the m. gastrocnemius of eight human cadavers in order to describe, in some detail, the architecture of the muscle and its heads. The fibres of the lateral head contain more sarcomeres than those of the medial head. The effect of this difference on the length-force curve of the muscle, calculated with a planimetric muscle model, is diminished by the effect of the difference of fibre angle with respect to the line of pull of the muscle. Within the heads some variation of the number of sarcomeres of the proximal and distal fibres occurs in all muscles. In the lateral head the distal fibres contain fewer sarcomeres than the proximal fibres. In the medial head this is also found in some heads, while others show the reverse. In the lateral head the longer fibres have smaller angles of attachment to the tendon plate and vice versa, while in the medial heads this relationship is only found occasionally. Some variation in the number of sarcomeres is found in the fibres of one bundle. The effects of variations in the number of sarcomeres on the length-force curve are probably insignificant at greater muscle lengths, but may have some importance for the individual with relatively small muscle lengths.