Feede M R, Kuhlmann W D, Scheid P
Respir Physiol. 1977 Feb;29(1):35-48. doi: 10.1016/0034-5687(77)90115-3.
Single unit vagal recordings from intrapulmonary receptors were obtained in decerebrate, paralyzed lizards both during pump ventilation and during unidirectional ventilation on the cannulated, sack-shaped lung. Two types of receptors were identified: (1) CO2-receptors, which increased their discharge frequency as intrapulmonary CO2 concentration decreased but were not sensitive to stretch of the lung. (2) Mechanoreceptors, which rapidly increased discharge frequency when the lung was stretched. These receptors' CO2 sensitivity varied. Lungs of lizards thus appeared to possess both CO2 receptors, which have functional characteristics similar to those in birds, and mechanoreceptors with properties similar to stretch receptors in mammals.
在去脑、麻痹的蜥蜴中，通过插管的袋状肺进行泵通气和单向通气时，记录了来自肺内感受器的单单位迷走神经活动。识别出了两种类型的感受器：（1）二氧化碳感受器，其放电频率随着肺内二氧化碳浓度的降低而增加，但对肺的扩张不敏感。（2）机械感受器，当肺被拉伸时，其放电频率迅速增加。这些感受器的二氧化碳敏感性各不相同。因此，蜥蜴的肺似乎同时拥有功能特征与鸟类相似的二氧化碳感受器，以及特性与哺乳动物的牵张感受器相似的机械感受器。
