肌肉顺应性与机械冲动的纵向传递
Muscle compliance and the longitudinal transmission of mechanical impulses.
作者信息
Schoenberg M, Wells J B, Podolsky R J
出版信息
J Gen Physiol. 1974 Dec;64(6):623-42. doi: 10.1085/jgp.64.6.623.
Abstract
The time required for a mechanical impulse to propagate from one end to the other was measured directly in frog sartorius muscles and in fiber bundles from the semitendinosus muscle. When the fibers were fully activated, the transmission velocity was 170 mm/ms. In resting fibers the transmission time was three to four times greater than in activated fibers. Control experiments indicated that the transmission time across the tendons was negligible. A muscle compliance of 55-80 A per half sarcomere was estimated from these data. The "measurement time" of the method was calculated to be about 15 micros. This relatively short measurement time makes the method potentially useful for detecting changes in cross-bridge compliance.
摘要
在青蛙缝匠肌和半腱肌的纤维束中，直接测量了机械冲动从一端传播到另一端所需的时间。当纤维完全激活时，传播速度为170毫米/毫秒。在静息纤维中，传播时间比激活纤维中的传播时间大三到四倍。对照实验表明，穿过肌腱的传播时间可忽略不计。根据这些数据，估计每半个肌节的肌肉顺应性为55 - 80埃。该方法的“测量时间”经计算约为15微秒。这种相对较短的测量时间使得该方法在检测横桥顺应性变化方面具有潜在的用途。
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