[Sike activity of low-threshold stretch receptors in the lungs of cats under dynamic conditions]

The disharge frequency at the end of inspiration was by 13--19% higher and during expiration--by 18--20% lower than at the corresponding lung volume under static conditions. The influence of dynamic factor on impulse activity of low-threshold pulmonary stretch receptors was relatively weak ("volume receptors"). Afferent output from pulmonary stretch receptors during inspiration is 8 times as great as at the expiratory phase. During inspiratory efforts after tracheal occlusion the afferent output was 2 times, and during expiratory phase--1.5 times as great as the afferent output during expiration before the occlusion. The dynamic lowering of discharge frequency in fibers o pulmonary stretch receptors aid to the shortening of expiratory phase.