Smirnov V M
Biull Eksp Biol Med. 1993 May;115(5):451-3.
According to some investigators, tonus of sympathetic nervous system is not observed at all or marked a little, according to others--it is marked well. Tonus of sympathetic nerve has not been discovered at all in our experiments. The experiments have been made on narcotized and non-narcotized pigeons, guinea pigs, rats and dogs. The frequency of heart beats is regulated by n. vagus and humoral substances in rest.
一些研究者认为，完全观察不到或仅有轻微的交感神经系统紧张度，而另一些研究者则认为其很明显。在我们的实验中完全未发现交感神经紧张度。实验是在麻醉和未麻醉的鸽子、豚鼠、大鼠和狗身上进行的。静息时，心跳频率由迷走神经和体液物质调节。
