Twitch response in the canine vocalis muscle.
Twitch response in the canine vocalis muscle.
复制标题
犬声带肌肉的抽搐反应。
DOI：
10.1044/jshr.3003.290
复制
发表时间：
1987
期刊：
影响因子：
--
通讯作者：
Durham,P
中科院分区：
文献类型：
--
作者：
Alipour-Haghighi,F;Titze,IR;Durham,P
通过一系列的体外实验，研究了犬声门肌的抽动反应。处死前几分钟取犬喉标本，置于Krebs液中保存，温度37±1°C，pH 7.4±0.05。采用平行板银电极场刺激技术研究肌肉样品的抽动反应。用剑桥技术的双伺服系统(测力仪)对离体肌标本的峰值张力和等长收缩时间过程进行了电子测量。测量了7个样本在不同应变水平下的收缩时间和50%松弛时间。发现收缩时间在22~32ms之间，50%松弛时间在17~37ms之间。结果表明，声门肌是一种快速的肌肉，能够支持基频的变化而进行快速动作。
The twitch response of the canine vocalis muscle was investigated through a series of experiments conducted in vitro. Samples of vocalis muscle were dissected and prepared from canine larynges a few minutes before death and kept in Krebs solution at a temperature of 37 ± I°C and pH of 7.4 ± 0.05. Field stimulation with parallel-plate silver electrodes was applied to study the twitch response of muscle samples. The peak tension and time course of isometric contraction of isolated muscle samples were measured electronically with a Cambridge Technology Dual Servo System (ergometer). Contraction time and 50% relaxation time of this muscle were measured for seven samples at various levels of strain. It was found that contraction time ranged between 22 and 32 ms and 50% relaxation time ranged between 17 and 37 ms. Results indicate that the vocalis muscle is a fast muscle capable of performing rapid maneuvers in support of changes in fundamental frequency.