In the experiments on neuromuscular junctions in the frog m. cutaneous-pectoris, changes in the intensity and asynchronicity of transmitter release during high-frequency (10 and 50 <$E roman sec sup -1>) rhythmic stimulation of the motor nerve were investigated using extracellular recording. At low extracellular <$E roman Ca sup 2+> concentrations, rhythmic stimulation resulted in a gradual enlargement of the quantum content of end-plate currents (EPC), the so-called facilitation. The latter phenomenon was accompanied by an increase in the average value and variance of synaptic delays of single-quantum EPC, a shift of the main mode of their distribution towards greater values, and an increase in the latency of the nerve ending responses. The above-described changes reduce the magnitude of facilitation in the neuromuscular junction.

Ключ. слова: synaptic delay, facilitation, "residual calcium", nerve ending, calcium current, temporal course of transmitter release, latency
Індекс рубрикатора НБУВ: Е60*739.1*02

Рубрики:

Загальна зоологія

Шифр НБУВ: Ж61875 Пошук видання у каталогах НБУВ 

---

  Якщо, ви не знайшли інформацію про автора(ів) публікації, маєте бажання виправити або відобразити більш докладну інформацію про науковців України запрошуємо заповнити "Анкету науковця"