Cevese A, Poltronieri R, Zaffagni C
Boll Soc Ital Biol Sper. 1981 Dec 30;57(24):2410-6.
The negative chronotropic effects of combined stimulations of the right and left vagus nerves were compared with the effects of single nerve stimulations in 10 urethan anesthetized rabbits. The combined stimulations gave smaller effects than single nerve stimulations at double frequency, over a wide range of frequencies: this was more evident for the right vagus compared with right plus left, rather than vice versa. It is concluded that the effects of combined stimulations are partially occluded and that the left vagus has smaller effects than the right vagus, although such difference becomes apparent only with combined stimulations. Possible mechanisms of occlusion are discussed.
在10只经乌拉坦麻醉的家兔中，比较了右侧和左侧迷走神经联合刺激与单神经刺激的负性变时效应。在很宽的频率范围内，联合刺激在双倍频率时产生的效应比单神经刺激小：与右侧加左侧迷走神经联合刺激相比，右侧迷走神经单独刺激时这种情况更明显，而非相反。得出的结论是，联合刺激的效应部分被阻断，并且左侧迷走神经的效应比右侧迷走神经小，尽管这种差异仅在联合刺激时才明显。文中讨论了可能的阻断机制。
