[Mediator liberation at the neuromuscular junctions of rhythmically stimulated frog sartorius muscles].

Synapses of large fibers seem to have a more obvious initial increase followed by a greater decrease in quantum content (m) of EPPs than the small fibers. The total amount of neurotransmitter released during EPPs reproduction was much greater in the large fibres. The calculation of binomial parameters of transmitter release showed that n parameter repeated the dynamics of m, while the P parameter gradually increased. The initial uptake of P and increase of n was more obvious in verve endings of the large muscle fibres. The findings suggest an unequal length of synaptic contact.