BUILT FOR JUMPING - THE DESIGN OF THE FROG MUSCULAR SYSTEM
BUILT FOR JUMPING - THE DESIGN OF THE FROG MUSCULAR SYSTEM
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DOI：
10.1126/science.8278808
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发表时间：
1994-01-21
期刊：
影响因子：
56.9
通讯作者：
ROME, LC
中科院分区：
文献类型：
--
作者：
LUTZ, GJ;ROME, LC
青蛙跳跃时必须产生高水平的机械动力。青蛙跳起来的肌肉系统大概就是为了传递这种强大的力量而设计的。测量了跳跃过程中肌肉的长度变化和激活模式，并通过这种体内模式驱动了孤立的肌肉束。在跳跃过程中，肌肉产生最大的力量。具体来说，肌肉纤维(i)在最佳肌节长度下运行，（ii）在最佳缩短速度下运行，（iii）在发电时被最大限度地激活。因此，许多不同的参数必须协同发展，以产生一个能够进行这种爆炸性跳跃运动的系统。
Frogs must generate a high level of mechanical power when they jump. The muscular system of frogs that jump is presumably designed to deliver these high powers. The length changes and activation pattern that muscles undergo during jumping were measured, and isolated muscle bundles were driven through this in vivo pattern. During jumping muscles generated maximum power. Specifically the muscle fibers (i) operated at optimal sarcomere lengths, (ii) operated at optimal shortening velocities, and (iii) were maximally activated during power generation. Thus, many different parameters must have evolved in concert to produce a system capable of this explosive jumping movement.