Abstract: | The development of fatigue during the transmission of excitation through the frog neuromuscular synapse was studied. The blocking of neuromuscular transmission during fatigue was shown to be based on a reduction in the quantum composition of the mediator. Liberation of the mediator is disturbed not by a decrease in the reserves of acetylcholine in motor nerve endings, but by a decrease in the probability of liberation of each quantum.S. V. Kurashov State Medical Institute, Kazan'. Translated from Neirofiziologiya, Vol. 9, No. 1, pp. 78–85, January–February, 1977. |