[The mechanism of inhibition of small intestine contractions following irritation of rabbit's vagus nerve].
Explored was mechanism of inhibition of small intestine contractions due to weak irritation (0.5-2.5 V, 1-30 Hz, 0.3-1.0 ms) of the peripheral segment of rabbit's right vagus nerve. It was shown that the inhibitory effect can be blocked by benzohexamethonium, arphonade, atropine, rhausedyl, and a combination of propranolol and dehydroergotoxine. Inhibition is triggered by catecholamines released by sympathetic endings in consequence of activation of presynaptic M-cholinoreceptors on their surface. Presynaptic M-cholinoreceptors are activated by acetylcholine released by the endings of postganglionary parasympathetic nerve fibers.
Smirnov
V M
VM
Aviakosmicheskaya i Ekologicheskaya Meditsina, Russia.
Ivanchenko
L M
LM
Kromin
A A
AA
D000818:Animals; D002682:Chinchilla; D004558:Electric Stimulation; D007421:Intestine, Small / Q000294:innervation* / Q000503:physiopathology*; D009433:Neural Inhibition / Q000502:physiology; D011817:Rabbits; D014630:Vagus Nerve / Q000502:physiology*
Mekhanizm tormozheniia sokrashcheniĭ tonkoĭ kishki, voznikaiushchego pri razdrazhenii bluzhdaiushchego nerva u krolika.