Krylov B S, Semenova G M, Fel'berbaum R A
Fiziol Zh SSSR Im I M Sechenova. 1975 Jun;61(7):1054-9.
Electromyographic study of the laryngeal internal muscles in dogs showed that the character and intensity of the electrical activity are specific for each muscle not only in frequency and amplitude of potentials, but also in the relation to the phases of the breathing cycle. Phasic electrical activity of these muscles occurred either in inspiration or expiration, whereas in some muscles the activity was recorded both in inspiration and expiration. Besides the phasic electrical activity, a less pronounced constant activity in some muscles was observed. The functional value of this phenomenon may be connected with the fixation of the larynx cartilages, whereas that of the phasic activity is connected with the realization of the larynx respiratory function. It was shown that the instrinsic laryngeal muscles activity coordination in the breathing act is not static and strictly determined but has a dynamic character: it can change under various conditions. The final result of the action of the intrinsic laryngeal muscles determining the degree of the glottis opening in the rspective phase of the breathing cycle is conditioned by the simultaneous but differently pronounced and differently derected activity of some of these muscles.
对狗的喉内肌进行的肌电图研究表明，电活动的特征和强度不仅在电位频率和幅度上，而且在与呼吸周期各阶段的关系上，对每块肌肉来说都是特定的。这些肌肉的阶段性电活动发生在吸气或呼气时，而在某些肌肉中，吸气和呼气时均记录到活动。除了阶段性电活动外，还观察到某些肌肉中不太明显的持续性活动。这种现象的功能价值可能与喉软骨的固定有关，而阶段性活动的功能价值与喉呼吸功能的实现有关。结果表明，喉内肌在呼吸动作中的活动协调不是静态的、严格确定的，而是具有动态特征：它可以在各种条件下发生变化。在呼吸周期的相应阶段，决定声门开放程度的喉内肌作用的最终结果，取决于其中一些肌肉同时但程度不同、方向不同的活动。
