Abstract
The effect of fluctuations of the transmembrane potential on the generation of the action potential is studied by simulating the rabbit sinoatrial node (SAN) pacemaker. It is shown that the effect of fluctuations is enhanced with an increase in the concentration of acetylcholine and becomes most pronounced at the border of spontaneous activity loss and after it. When applying and washing off acetylcholine, the hysteretic effect is observed.
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