Dobretsov M G
Fiziol Zh SSSR Im I M Sechenova. 1987 Mar;73(3):366-72.
The depression of evoked transmitter release with solutions with enhanced (up to 8 mM) potassium concentration was studied in cut and voltage-clamped muscle fibers of frog m. cutaneous pectoris. As potassium blockade proceeds, a reduction of the second end-plate current to paired stimuli occurs before a change in the first end-plate current, the reduction of end-plate currents being simultaneous with the latency increase. The existence of variable sensitivity of different end-plates to potassium blocking action depends on year season and ionic environment. Possible mechanisms of potassium blocking action are discussed.
在青蛙胸皮肌的切断并电压钳制的肌纤维中，研究了用钾浓度升高（高达8 mM）的溶液诱发递质释放的抑制情况。随着钾离子阻断作用的进行，在第一个终板电流发生变化之前，第二个终板电流对成对刺激的反应就会降低，终板电流的降低与潜伏期延长同时出现。不同终板对钾离子阻断作用的敏感性存在差异，这取决于年份季节和离子环境。文中还讨论了钾离子阻断作用的可能机制。
