Finkel' M L
Zh Evol Biokhim Fiziol. 1975 Jan-Feb;11(1):92-5.
Two types of electrical activity - inspiratory and tonic (postural) ones - have been registered in the external intercostal muscles and diaphragm. Both types of the activity decrease during orthodoxical sleep as compared with the period of quiet awakefulness. During the transition of orthodoxical sleep into paradoxical one, tonic activity is completely inhibited, while inspiratory activity in the intercostal muscles remains unchanged, being increased in the diaphragm. In the period of rapid eye movements inspiratory activity of the intercostal muscles is reduced. The decreased tone of the intercostal muscles accounts for changes in respiratory movements and for the onset of asynchoronous thoracic and abdominal respiratory movements during paradoxical sleep.
在外肋间肌和膈肌中记录到了两种电活动——吸气性和紧张性（姿势性）电活动。与安静清醒期相比，在正统睡眠期间这两种活动都会减少。在从正统睡眠向异相睡眠过渡时，紧张性活动完全受到抑制，而肋间肌的吸气性活动保持不变，在膈肌中则增加。在快速眼动期，肋间肌的吸气性活动会减少。肋间肌张力降低是异相睡眠期间呼吸运动变化以及胸腹部呼吸运动异步发作的原因。
